pres/reveal.js-master/css/theme/template/mixins.scss

+@mixin vertical-gradient( $top, $bottom ) {
+	background: $top;
+	background: -moz-linear-gradient( top, $top 0%, $bottom 100% );
+	background: -webkit-gradient( linear, left top, left bottom, color-stop(0%,$top), color-stop(100%,$bottom) );
+	background: -webkit-linear-gradient( top, $top 0%, $bottom 100% );
+	background: -o-linear-gradient( top, $top 0%, $bottom 100% );
+	background: -ms-linear-gradient( top, $top 0%, $bottom 100% );
+	background: linear-gradient( top, $top 0%, $bottom 100% );
+}
+
+@mixin horizontal-gradient( $top, $bottom ) {
+	background: $top;
+	background: -moz-linear-gradient( left, $top 0%, $bottom 100% );
+	background: -webkit-gradient( linear, left top, right top, color-stop(0%,$top), color-stop(100%,$bottom) );
+	background: -webkit-linear-gradient( left, $top 0%, $bottom 100% );
+	background: -o-linear-gradient( left, $top 0%, $bottom 100% );
+	background: -ms-linear-gradient( left, $top 0%, $bottom 100% );
+	background: linear-gradient( left, $top 0%, $bottom 100% );
+}
+
+@mixin radial-gradient( $outer, $inner, $type: circle ) {
+	background: $outer;
+	background: -moz-radial-gradient( center, $type cover,  $inner 0%, $outer 100% );
+	background: -webkit-gradient( radial, center center, 0px, center center, 100%, color-stop(0%,$inner), color-stop(100%,$outer) );
+	background: -webkit-radial-gradient( center, $type cover,  $inner 0%, $outer 100% );
+	background: -o-radial-gradient( center, $type cover,  $inner 0%, $outer 100% );
+	background: -ms-radial-gradient( center, $type cover,  $inner 0%, $outer 100% );
+	background: radial-gradient( center, $type cover,  $inner 0%, $outer 100% );
+}
\ No newline at end of file

pres/reveal.js-master/css/theme/template/settings.scss

+// Base settings for all themes that can optionally be
+// overridden by the super-theme
+
+// Background of the presentation
+$backgroundColor: #2b2b2b;
+
+// Primary/body text
+$mainFont: 'Lato', sans-serif;
+$mainFontSize: 40px;
+$mainColor: #eee;
+
+// Vertical spacing between blocks of text
+$blockMargin: 20px;
+
+// Headings
+$headingMargin: 0 0 $blockMargin 0;
+$headingFont: 'League Gothic', Impact, sans-serif;
+$headingColor: #eee;
+$headingLineHeight: 1.2;
+$headingLetterSpacing: normal;
+$headingTextTransform: uppercase;
+$headingTextShadow: none;
+$headingFontWeight: normal;
+$heading1TextShadow: $headingTextShadow;
+
+$heading1Size: 3.77em;
+$heading2Size: 2.11em;
+$heading3Size: 1.55em;
+$heading4Size: 1.00em;
+
+// Links and actions
+$linkColor: #13DAEC;
+$linkColorHover: lighten( $linkColor, 20% );
+
+// Text selection
+$selectionBackgroundColor: #FF5E99;
+$selectionColor: #fff;
+
+// Generates the presentation background, can be overridden
+// to return a background image or gradient
+@mixin bodyBackground() {
+	background: $backgroundColor;
+}
\ No newline at end of file

pres/reveal.js-master/css/theme/template/theme.scss

+// Base theme template for reveal.js
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+
+body {
+	@include bodyBackground();
+	background-color: $backgroundColor;
+}
+
+.reveal {
+	font-family: $mainFont;
+	font-size: $mainFontSize;
+	font-weight: normal;
+	color: $mainColor;
+}
+
+::selection {
+	color: $selectionColor;
+	background: $selectionBackgroundColor;
+	text-shadow: none;
+}
+
+::-moz-selection {
+	color: $selectionColor;
+	background: $selectionBackgroundColor;
+	text-shadow: none;
+}
+
+.reveal .slides>section,
+.reveal .slides>section>section {
+	line-height: 1.3;
+	font-weight: inherit;
+}
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+	margin: $headingMargin;
+	color: $headingColor;
+
+	font-family: $headingFont;
+	font-weight: $headingFontWeight;
+	line-height: $headingLineHeight;
+	letter-spacing: $headingLetterSpacing;
+
+	text-transform: $headingTextTransform;
+	text-shadow: $headingTextShadow;
+
+	word-wrap: break-word;
+}
+
+.reveal h1 {font-size: $heading1Size; }
+.reveal h2 {font-size: $heading2Size; }
+.reveal h3 {font-size: $heading3Size; }
+.reveal h4 {font-size: $heading4Size; }
+
+.reveal h1 {
+	text-shadow: $heading1TextShadow;
+}
+
+
+/*********************************************
+ * OTHER
+ *********************************************/
+
+.reveal p {
+	margin: $blockMargin 0;
+	line-height: 1.3;
+}
+
+/* Ensure certain elements are never larger than the slide itself */
+.reveal img,
+.reveal video,
+.reveal iframe {
+	max-width: 95%;
+	max-height: 95%;
+}
+.reveal strong,
+.reveal b {
+	font-weight: bold;
+}
+
+.reveal em {
+	font-style: italic;
+}
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+	display: inline-block;
+
+	text-align: left;
+	margin: 0 0 0 1em;
+}
+
+.reveal ol {
+	list-style-type: decimal;
+}
+
+.reveal ul {
+	list-style-type: disc;
+}
+
+.reveal ul ul {
+	list-style-type: square;
+}
+
+.reveal ul ul ul {
+	list-style-type: circle;
+}
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+	display: block;
+	margin-left: 40px;
+}
+
+.reveal dt {
+	font-weight: bold;
+}
+
+.reveal dd {
+	margin-left: 40px;
+}
+
+.reveal q,
+.reveal blockquote {
+	quotes: none;
+}
+
+.reveal blockquote {
+	display: block;
+	position: relative;
+	width: 70%;
+	margin: $blockMargin auto;
+	padding: 5px;
+
+	font-style: italic;
+	background: rgba(255, 255, 255, 0.05);
+	box-shadow: 0px 0px 2px rgba(0,0,0,0.2);
+}
+	.reveal blockquote p:first-child,
+	.reveal blockquote p:last-child {
+		display: inline-block;
+	}
+
+.reveal q {
+	font-style: italic;
+}
+
+.reveal pre {
+	display: block;
+	position: relative;
+	width: 90%;
+	margin: $blockMargin auto;
+
+	text-align: left;
+	font-size: 0.55em;
+	font-family: monospace;
+	line-height: 1.2em;
+
+	word-wrap: break-word;
+
+	box-shadow: 0px 0px 6px rgba(0,0,0,0.3);
+}
+.reveal code {
+	font-family: monospace;
+}
+
+.reveal pre code {
+	display: block;
+	padding: 5px;
+	overflow: auto;
+	max-height: 400px;
+	word-wrap: normal;
+}
+
+.reveal table {
+	margin: auto;
+	border-collapse: collapse;
+	border-spacing: 0;
+}
+
+.reveal table th {
+	font-weight: bold;
+}
+
+.reveal table th,
+.reveal table td {
+	text-align: left;
+	padding: 0.2em 0.5em 0.2em 0.5em;
+	border-bottom: 1px solid;
+}
+
+.reveal table th[align="center"],
+.reveal table td[align="center"] {
+	text-align: center;
+}
+
+.reveal table th[align="right"],
+.reveal table td[align="right"] {
+	text-align: right;
+}
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+	border-bottom: none;
+}
+
+.reveal sup {
+	vertical-align: super;
+}
+.reveal sub {
+	vertical-align: sub;
+}
+
+.reveal small {
+	display: inline-block;
+	font-size: 0.6em;
+	line-height: 1.2em;
+	vertical-align: top;
+}
+
+.reveal small * {
+	vertical-align: top;
+}
+
+
+/*********************************************
+ * LINKS
+ *********************************************/
+
+.reveal a {
+	color: $linkColor;
+	text-decoration: none;
+
+	-webkit-transition: color .15s ease;
+	   -moz-transition: color .15s ease;
+	        transition: color .15s ease;
+}
+	.reveal a:hover {
+		color: $linkColorHover;
+
+		text-shadow: none;
+		border: none;
+	}
+
+.reveal .roll span:after {
+	color: #fff;
+	background: darken( $linkColor, 15% );
+}
+
+
+/*********************************************
+ * IMAGES
+ *********************************************/
+
+.reveal section img {
+	margin: 15px 0px;
+	background: rgba(255,255,255,0.12);
+	border: 4px solid $mainColor;
+
+	box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
+
+	.reveal section img.plain {
+		border: 0;
+		box-shadow: none;
+	}
+
+	.reveal a img {
+		-webkit-transition: all .15s linear;
+		   -moz-transition: all .15s linear;
+		        transition: all .15s linear;
+	}
+
+	.reveal a:hover img {
+		background: rgba(255,255,255,0.2);
+		border-color: $linkColor;
+
+		box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+	}
+
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+
+.reveal .controls .navigate-left,
+.reveal .controls .navigate-left.enabled {
+	border-right-color: $linkColor;
+}
+
+.reveal .controls .navigate-right,
+.reveal .controls .navigate-right.enabled {
+	border-left-color: $linkColor;
+}
+
+.reveal .controls .navigate-up,
+.reveal .controls .navigate-up.enabled {
+	border-bottom-color: $linkColor;
+}
+
+.reveal .controls .navigate-down,
+.reveal .controls .navigate-down.enabled {
+	border-top-color: $linkColor;
+}
+
+.reveal .controls .navigate-left.enabled:hover {
+	border-right-color: $linkColorHover;
+}
+
+.reveal .controls .navigate-right.enabled:hover {
+	border-left-color: $linkColorHover;
+}
+
+.reveal .controls .navigate-up.enabled:hover {
+	border-bottom-color: $linkColorHover;
+}
+
+.reveal .controls .navigate-down.enabled:hover {
+	border-top-color: $linkColorHover;
+}
+
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+
+.reveal .progress {
+	background: rgba(0,0,0,0.2);
+}
+	.reveal .progress span {
+		background: $linkColor;
+
+		-webkit-transition: width 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985);
+		   -moz-transition: width 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985);
+		        transition: width 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985);
+	}
+
+

pres/reveal.js-master/css/theme/white.css

+/**
+ * White theme for reveal.js. This is the opposite of the 'black' theme.
+ *
+ * By Hakim El Hattab, http://hakim.se
+ */
+@import url(../../lib/font/source-sans-pro/source-sans-pro.css);
+section.has-dark-background, section.has-dark-background h1, section.has-dark-background h2, section.has-dark-background h3, section.has-dark-background h4, section.has-dark-background h5, section.has-dark-background h6 {
+  color: #fff; }
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+body {
+  background: #fff;
+  background-color: #fff; }
+
+.reveal {
+  font-family: "Source Sans Pro", Helvetica, sans-serif;
+  font-size: 38px;
+  font-weight: normal;
+  color: #222; }
+
+::selection {
+  color: #fff;
+  background: #98bdef;
+  text-shadow: none; }
+
+::-moz-selection {
+  color: #fff;
+  background: #98bdef;
+  text-shadow: none; }
+
+.reveal .slides > section,
+.reveal .slides > section > section {
+  line-height: 1.3;
+  font-weight: inherit; }
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: 0 0 20px 0;
+  color: #222;
+  font-family: "Source Sans Pro", Helvetica, sans-serif;
+  font-weight: 600;
+  line-height: 1.2;
+  letter-spacing: normal;
+  /*text-transform: uppercase;*/
+  text-shadow: none;
+  word-wrap: break-word; }
+
+.reveal h1 {
+  font-size: 2.5em; }
+
+.reveal h2 {
+  font-size: 1.6em; }
+
+.reveal h3 {
+  font-size: 1.3em; }
+
+.reveal h4 {
+  font-size: 1em; }
+
+.reveal h1 {
+  text-shadow: none; }
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: 20px 0;
+  line-height: 1.3; }
+
+/* Ensure certain elements are never larger than the slide itself */
+.reveal img,
+.reveal video,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%; }
+
+.reveal strong,
+.reveal b {
+  font-weight: bold; }
+
+.reveal em {
+  font-style: italic; }
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em; }
+
+.reveal ol {
+  list-style-type: decimal; }
+
+.reveal ul {
+  list-style-type: disc; }
+
+.reveal ul ul {
+  list-style-type: square; }
+
+.reveal ul ul ul {
+  list-style-type: circle; }
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px; }
+
+.reveal dt {
+  font-weight: bold; }
+
+.reveal dd {
+  margin-left: 40px; }
+
+.reveal q,
+.reveal blockquote {
+  quotes: none; }
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: 20px auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block; }
+
+.reveal q {
+  font-style: italic; }
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: 20px auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: monospace;
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+
+.reveal code {
+  font-family: monospace; }
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal; }
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0; }
+
+.reveal table th {
+  font-weight: bold; }
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid; }
+
+.reveal table th[align="center"],
+.reveal table td[align="center"] {
+  text-align: center; }
+
+.reveal table th[align="right"],
+.reveal table td[align="right"] {
+  text-align: right; }
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none; }
+
+.reveal sup {
+  vertical-align: super; }
+
+.reveal sub {
+  vertical-align: sub; }
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top; }
+
+.reveal small * {
+  vertical-align: top; }
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: #2a76dd;
+  text-decoration: none;
+  -webkit-transition: color .15s ease;
+  -moz-transition: color .15s ease;
+  transition: color .15s ease; }
+
+.reveal a:hover {
+  color: #6ca0e8;
+  text-shadow: none;
+  border: none; }
+
+.reveal .roll span:after {
+  color: #fff;
+  background: #1a53a1; }
+
+/*********************************************
+ * IMAGES
+ *********************************************/
+.reveal section img {
+  margin: 15px 0px;
+  background: rgba(255, 255, 255, 0.12);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
+.reveal a img {
+  -webkit-transition: all .15s linear;
+  -moz-transition: all .15s linear;
+  transition: all .15s linear; }
+
+.reveal a:hover img {
+  background: rgba(255, 255, 255, 0.2);
+  border-color: #2a76dd;
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls .navigate-left,
+.reveal .controls .navigate-left.enabled {
+  border-right-color: #2a76dd; }
+
+.reveal .controls .navigate-right,
+.reveal .controls .navigate-right.enabled {
+  border-left-color: #2a76dd; }
+
+.reveal .controls .navigate-up,
+.reveal .controls .navigate-up.enabled {
+  border-bottom-color: #2a76dd; }
+
+.reveal .controls .navigate-down,
+.reveal .controls .navigate-down.enabled {
+  border-top-color: #2a76dd; }
+
+.reveal .controls .navigate-left.enabled:hover {
+  border-right-color: #6ca0e8; }
+
+.reveal .controls .navigate-right.enabled:hover {
+  border-left-color: #6ca0e8; }
+
+.reveal .controls .navigate-up.enabled:hover {
+  border-bottom-color: #6ca0e8; }
+
+.reveal .controls .navigate-down.enabled:hover {
+  border-top-color: #6ca0e8; }
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2); }
+
+.reveal .progress span {
+  background: #2a76dd;
+  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
+  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
+  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }

pres/reveal.js-master/demo.html

+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js – The HTML Presentation Framework</title>
+
+		<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
+		<meta name="author" content="Hakim El Hattab">
+
+		<meta name="apple-mobile-web-app-capable" content="yes">
+		<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
+
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+
+		<link rel="stylesheet" href="css/reveal.css">
+		<link rel="stylesheet" href="css/theme/black.css" id="theme">
+
+		<!-- Theme used for syntax highlighting of code -->
+		<link rel="stylesheet" href="lib/css/zenburn.css">
+
+		<!-- Printing and PDF exports -->
+		<script>
+			var link = document.createElement( 'link' );
+			link.rel = 'stylesheet';
+			link.type = 'text/css';
+			link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
+			document.getElementsByTagName( 'head' )[0].appendChild( link );
+		</script>
+
+		<!--[if lt IE 9]>
+		<script src="lib/js/html5shiv.js"></script>
+		<![endif]-->
+	</head>
+
+	<body>
+
+		<div class="reveal">
+
+			<!-- Any section element inside of this container is displayed as a slide -->
+			<div class="slides">
+				<section>
+					<h1>Reveal.js</h1>
+					<h3>The HTML Presentation Framework</h3>
+					<p>
+						<small>Created by <a href="http://hakim.se">Hakim El Hattab</a> / <a href="http://twitter.com/hakimel">@hakimel</a></small>
+					</p>
+				</section>
+
+				<section>
+					<h2>Hello There</h2>
+					<p>
+						reveal.js enables you to create beautiful interactive slide decks using HTML. This presentation will show you examples of what it can do.
+					</p>
+				</section>
+
+				<!-- Example of nested vertical slides -->
+				<section>
+					<section>
+						<h2>Vertical Slides</h2>
+						<p>Slides can be nested inside of each other.</p>
+						<p>Use the <em>Space</em> key to navigate through all slides.</p>
+						<br>
+						<a href="#" class="navigate-down">
+							<img width="178" height="238" data-src="https://s3.amazonaws.com/hakim-static/reveal-js/arrow.png" alt="Down arrow">
+						</a>
+					</section>
+					<section>
+						<h2>Basement Level 1</h2>
+						<p>Nested slides are useful for adding additional detail underneath a high level horizontal slide.</p>
+					</section>
+					<section>
+						<h2>Basement Level 2</h2>
+						<p>That's it, time to go back up.</p>
+						<br>
+						<a href="#/2">
+							<img width="178" height="238" data-src="https://s3.amazonaws.com/hakim-static/reveal-js/arrow.png" alt="Up arrow" style="transform: rotate(180deg); -webkit-transform: rotate(180deg);">
+						</a>
+					</section>
+				</section>
+
+				<section>
+					<h2>Slides</h2>
+					<p>
+						Not a coder? Not a problem. There's a fully-featured visual editor for authoring these, try it out at <a href="http://slides.com" target="_blank">http://slides.com</a>.
+					</p>
+				</section>
+
+				<section>
+					<h2>Point of View</h2>
+					<p>
+						Press <strong>ESC</strong> to enter the slide overview.
+					</p>
+					<p>
+						Hold down alt and click on any element to zoom in on it using <a href="http://lab.hakim.se/zoom-js">zoom.js</a>. Alt + click anywhere to zoom back out.
+					</p>
+				</section>
+
+				<section>
+					<h2>Touch Optimized</h2>
+					<p>
+						Presentations look great on touch devices, like mobile phones and tablets. Simply swipe through your slides.
+					</p>
+				</section>
+
+				<section data-markdown>
+					<script type="text/template">
+						## Markdown support
+
+						Write content using inline or external Markdown.
+						Instructions and more info available in the [readme](https://github.com/hakimel/reveal.js#markdown).
+
+						```
+						<section data-markdown>
+						  ## Markdown support
+
+						  Write content using inline or external Markdown.
+						  Instructions and more info available in the [readme](https://github.com/hakimel/reveal.js#markdown).
+						</section>
+						```
+					</script>
+				</section>
+
+				<section>
+					<section id="fragments">
+						<h2>Fragments</h2>
+						<p>Hit the next arrow...</p>
+						<p class="fragment">... to step through ...</p>
+						<p><span class="fragment">... a</span> <span class="fragment">fragmented</span> <span class="fragment">slide.</span></p>
+
+						<aside class="notes">
+							This slide has fragments which are also stepped through in the notes window.
+						</aside>
+					</section>
+					<section>
+						<h2>Fragment Styles</h2>
+						<p>There's different types of fragments, like:</p>
+						<p class="fragment grow">grow</p>
+						<p class="fragment shrink">shrink</p>
+						<p class="fragment fade-out">fade-out</p>
+						<p class="fragment fade-up">fade-up (also down, left and right!)</p>
+						<p class="fragment current-visible">current-visible</p>
+						<p>Highlight <span class="fragment highlight-red">red</span> <span class="fragment highlight-blue">blue</span> <span class="fragment highlight-green">green</span></p>
+					</section>
+				</section>
+
+				<section id="transitions">
+					<h2>Transition Styles</h2>
+					<p>
+						You can select from different transitions, like: <br>
+						<a href="?transition=none#/transitions">None</a> -
+						<a href="?transition=fade#/transitions">Fade</a> -
+						<a href="?transition=slide#/transitions">Slide</a> -
+						<a href="?transition=convex#/transitions">Convex</a> -
+						<a href="?transition=concave#/transitions">Concave</a> -
+						<a href="?transition=zoom#/transitions">Zoom</a>
+					</p>
+				</section>
+
+				<section id="themes">
+					<h2>Themes</h2>
+					<p>
+						reveal.js comes with a few themes built in: <br>
+						<!-- Hacks to swap themes after the page has loaded. Not flexible and only intended for the reveal.js demo deck. -->
+						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/black.css'); return false;">Black (default)</a> -
+						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/white.css'); return false;">White</a> -
+						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/league.css'); return false;">League</a> -
+						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/sky.css'); return false;">Sky</a> -
+						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/beige.css'); return false;">Beige</a> -
+						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/simple.css'); return false;">Simple</a> <br>
+						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/serif.css'); return false;">Serif</a> -
+						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/blood.css'); return false;">Blood</a> -
+						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/night.css'); return false;">Night</a> -
+						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/moon.css'); return false;">Moon</a> -
+						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/solarized.css'); return false;">Solarized</a>
+					</p>
+				</section>
+
+				<section>
+					<section data-background="#dddddd">
+						<h2>Slide Backgrounds</h2>
+						<p>
+							Set <code>data-background="#dddddd"</code> on a slide to change the background color. All CSS color formats are supported.
+						</p>
+						<a href="#" class="navigate-down">
+							<img width="178" height="238" data-src="https://s3.amazonaws.com/hakim-static/reveal-js/arrow.png" alt="Down arrow">
+						</a>
+					</section>
+					<section data-background="https://s3.amazonaws.com/hakim-static/reveal-js/image-placeholder.png">
+						<h2>Image Backgrounds</h2>
+						<pre><code class="hljs">&lt;section data-background="image.png"&gt;</code></pre>
+					</section>
+					<section data-background="https://s3.amazonaws.com/hakim-static/reveal-js/image-placeholder.png" data-background-repeat="repeat" data-background-size="100px">
+						<h2>Tiled Backgrounds</h2>
+						<pre><code class="hljs" style="word-wrap: break-word;">&lt;section data-background="image.png" data-background-repeat="repeat" data-background-size="100px"&gt;</code></pre>
+					</section>
+					<section data-background-video="https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.mp4,https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.webm" data-background-color="#000000">
+						<div style="background-color: rgba(0, 0, 0, 0.9); color: #fff; padding: 20px;">
+							<h2>Video Backgrounds</h2>
+							<pre><code class="hljs" style="word-wrap: break-word;">&lt;section data-background-video="video.mp4,video.webm"&gt;</code></pre>
+						</div>
+					</section>
+					<section data-background="http://i.giphy.com/90F8aUepslB84.gif">
+						<h2>... and GIFs!</h2>
+					</section>
+				</section>
+
+				<section data-transition="slide" data-background="#4d7e65" data-background-transition="zoom">
+					<h2>Background Transitions</h2>
+					<p>
+						Different background transitions are available via the backgroundTransition option. This one's called "zoom".
+					</p>
+					<pre><code class="hljs">Reveal.configure({ backgroundTransition: 'zoom' })</code></pre>
+				</section>
+
+				<section data-transition="slide" data-background="#b5533c" data-background-transition="zoom">
+					<h2>Background Transitions</h2>
+					<p>
+						You can override background transitions per-slide.
+					</p>
+					<pre><code class="hljs" style="word-wrap: break-word;">&lt;section data-background-transition="zoom"&gt;</code></pre>
+				</section>
+
+				<section>
+					<h2>Pretty Code</h2>
+					<pre><code class="hljs" data-trim contenteditable>
+function linkify( selector ) {
+  if( supports3DTransforms ) {
+
+    var nodes = document.querySelectorAll( selector );
+
+    for( var i = 0, len = nodes.length; i &lt; len; i++ ) {
+      var node = nodes[i];
+
+      if( !node.className ) {
+        node.className += ' roll';
+      }
+    }
+  }
+}
+					</code></pre>
+					<p>Code syntax highlighting courtesy of <a href="http://softwaremaniacs.org/soft/highlight/en/description/">highlight.js</a>.</p>
+				</section>
+
+				<section>
+					<h2>Marvelous List</h2>
+					<ul>
+						<li>No order here</li>
+						<li>Or here</li>
+						<li>Or here</li>
+						<li>Or here</li>
+					</ul>
+				</section>
+
+				<section>
+					<h2>Fantastic Ordered List</h2>
+					<ol>
+						<li>One is smaller than...</li>
+						<li>Two is smaller than...</li>
+						<li>Three!</li>
+					</ol>
+				</section>
+
+				<section>
+					<h2>Tabular Tables</h2>
+					<table>
+						<thead>
+							<tr>
+								<th>Item</th>
+								<th>Value</th>
+								<th>Quantity</th>
+							</tr>
+						</thead>
+						<tbody>
+							<tr>
+								<td>Apples</td>
+								<td>$1</td>
+								<td>7</td>
+							</tr>
+							<tr>
+								<td>Lemonade</td>
+								<td>$2</td>
+								<td>18</td>
+							</tr>
+							<tr>
+								<td>Bread</td>
+								<td>$3</td>
+								<td>2</td>
+							</tr>
+						</tbody>
+					</table>
+				</section>
+
+				<section>
+					<h2>Clever Quotes</h2>
+					<p>
+						These guys come in two forms, inline: <q cite="http://searchservervirtualization.techtarget.com/definition/Our-Favorite-Technology-Quotations">
+						&ldquo;The nice thing about standards is that there are so many to choose from&rdquo;</q> and block:
+					</p>
+					<blockquote cite="http://searchservervirtualization.techtarget.com/definition/Our-Favorite-Technology-Quotations">
+						&ldquo;For years there has been a theory that millions of monkeys typing at random on millions of typewriters would
+						reproduce the entire works of Shakespeare. The Internet has proven this theory to be untrue.&rdquo;
+					</blockquote>
+				</section>
+
+				<section>
+					<h2>Intergalactic Interconnections</h2>
+					<p>
+						You can link between slides internally,
+						<a href="#/2/3">like this</a>.
+					</p>
+				</section>
+
+				<section>
+					<h2>Speaker View</h2>
+					<p>There's a <a href="https://github.com/hakimel/reveal.js#speaker-notes">speaker view</a>. It includes a timer, preview of the upcoming slide as well as your speaker notes.</p>
+					<p>Press the <em>S</em> key to try it out.</p>
+
+					<aside class="notes">
+						Oh hey, these are some notes. They'll be hidden in your presentation, but you can see them if you open the speaker notes window (hit 's' on your keyboard).
+					</aside>
+				</section>
+
+				<section>
+					<h2>Export to PDF</h2>
+					<p>Presentations can be <a href="https://github.com/hakimel/reveal.js#pdf-export">exported to PDF</a>, here's an example:</p>
+					<iframe data-src="https://www.slideshare.net/slideshow/embed_code/42840540" width="445" height="355" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" style="border:3px solid #666; margin-bottom:5px; max-width: 100%;" allowfullscreen> </iframe>
+				</section>
+
+				<section>
+					<h2>Global State</h2>
+					<p>
+						Set <code>data-state="something"</code> on a slide and <code>"something"</code>
+						will be added as a class to the document element when the slide is open. This lets you
+						apply broader style changes, like switching the page background.
+					</p>
+				</section>
+
+				<section data-state="customevent">
+					<h2>State Events</h2>
+					<p>
+						Additionally custom events can be triggered on a per slide basis by binding to the <code>data-state</code> name.
+					</p>
+					<pre><code class="javascript" data-trim contenteditable style="font-size: 18px;">
+Reveal.addEventListener( 'customevent', function() {
+	console.log( '"customevent" has fired' );
+} );
+					</code></pre>
+				</section>
+
+				<section>
+					<h2>Take a Moment</h2>
+					<p>
+						Press B or . on your keyboard to pause the presentation. This is helpful when you're on stage and want to take distracting slides off the screen.
+					</p>
+				</section>
+
+				<section>
+					<h2>Much more</h2>
+					<ul>
+						<li>Right-to-left support</li>
+						<li><a href="https://github.com/hakimel/reveal.js#api">Extensive JavaScript API</a></li>
+						<li><a href="https://github.com/hakimel/reveal.js#auto-sliding">Auto-progression</a></li>
+						<li><a href="https://github.com/hakimel/reveal.js#parallax-background">Parallax backgrounds</a></li>
+						<li><a href="https://github.com/hakimel/reveal.js#keyboard-bindings">Custom keyboard bindings</a></li>
+					</ul>
+				</section>
+
+				<section style="text-align: left;">
+					<h1>THE END</h1>
+					<p>
+						- <a href="http://slides.com">Try the online editor</a> <br>
+						- <a href="https://github.com/hakimel/reveal.js">Source code &amp; documentation</a>
+					</p>
+				</section>
+
+			</div>
+
+		</div>
+
+		<script src="lib/js/head.min.js"></script>
+		<script src="js/reveal.js"></script>
+
+		<script>
+
+			// More info https://github.com/hakimel/reveal.js#configuration
+			Reveal.initialize({
+				controls: true,
+				progress: true,
+				history: true,
+				center: true,
+
+				transition: 'slide', // none/fade/slide/convex/concave/zoom
+
+				// More info https://github.com/hakimel/reveal.js#dependencies
+				dependencies: [
+					{ src: 'lib/js/classList.js', condition: function() { return !document.body.classList; } },
+					{ src: 'plugin/markdown/marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
+					{ src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
+					{ src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
+					{ src: 'plugin/zoom-js/zoom.js', async: true },
+					{ src: 'plugin/notes/notes.js', async: true }
+				]
+			});
+
+		</script>
+
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pres/reveal.js-master/index.html

+<!doctype html>
+<html>
+	<head>
+		<meta charset="utf-8">
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+
+		<title>Droplet Sequenz Generator</title>
+
+		<link rel="stylesheet" href="css/reveal.css">
+		<link rel="stylesheet" href="css/theme/white.css">
+
+		<!-- Theme used for syntax highlighting of code -->
+		<link rel="stylesheet" href="lib/css/zenburn.css">
+
+		<!-- Printing and PDF exports -->
+		<script>
+			var link = document.createElement( 'link' );
+			link.rel = 'stylesheet';
+			link.type = 'text/css';
+			link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
+			document.getElementsByTagName( 'head' )[0].appendChild( link );
+		</script>
+	</head>
+	<body>
+		<div class="reveal">
+			<div class="slides">
+				<section>
+          <h4> Basic Idea </h4>
+          <img src="img/basic-idea.svg" align="center">
+        </section>
+
+				<section>
+          <h4> Multiple Paths </h4>
+          <img src="img/multiple-paths.svg" align="center">
+        </section>
+
+				<section>
+          <h4> Sequence Tuple</h4>
+          <ul>
+            <li> Generate multiple possible sequences </li>
+            <li> (Droplet, Path, Current Bifurcation, minSteps, maxSteps) </li>
+          </ul>
+        </section>
+
+				<section>
+          <h4> Algorithm to generate all possible sequences </h4>
+          <ul>
+            <li> Start with Payload Droplet at last Bifurcation in its path </li>
+          </ul>
+                      <pre><code class="hljs" data-trim contenteditable>
+  if headerDroplet needed:
+    for all possible header droplet paths:
+      add header droplet to list of sequenceTuples
+      add list of sequenceTuples to list of possible Sequences
+          </pre></code>
+
+        </section>
+
+				<section>
+          <h4> Algorithm to generate all possible sequences </h4>
+          <ul>
+            <li> List of possible Sequences</li>
+            <li> { { (Pld, Path, currBif, 0,0),(Hdr-A, H-A-Path, curBif, minOffset-A, maxOffset-A)} <br>{ (Pld, Path, currBif, 0,0),(Hdr-B, H-B-Path, curBif, minOffset-B, maxOffset-B) } }</li>
+          </ul>
+        </section>
+
+				<section>
+          <h4> Algorithm to generate all possible sequences </h4>
+          <ul>
+            <li> Ascend the Path recursively for every Droplet and decide at every Bifurcation if another heder droplet is needed</li>
+            <li> This generates a (possibly huge) list of possibleSequences </li>
+          </ul>
+        </section>
+
+				<section>
+          <h4> Derive Droplet Sequence from list of possible sequences </h4>
+          <ul>
+            <li> Not every entry in the list of possible sequences represents a feasible sequence (e.g. same start time for 2 droplets) </li>
+          </ul>
+                      <pre><code class="hljs" data-trim contenteditable>
+sort list of possible sequences according to their length
+take shortest sequence
+if sequence is feasible and droplets don't coalesce:
+  return found sequence
+else:
+  move on to next sequence
+          </pre></code>
+        </section>
+
+				<section>
+          <h4> Possible Improvements</h4>
+          <ul>
+            <li>Performance ! </li>
+            <li>Recursion for finding possible sequences not implemented with good performance</li>
+            <ol>
+              <li>Check paths for header droplets that are likely to produce a short (with a lower amount of header droplets) sequence </li>
+              <li>After all possible sequences for these few paths are found check for feasability and colesceing </li>
+              <li>Just in case no sequence was found check the more complicated possible sequences</li>
+            </ol>
+            <li>No verfication yet (that the sequence really realizes the correct payload path) </li>
+          </ul>
+        </section>
+
+			</div>
+		</div>
+
+		<script src="lib/js/head.min.js"></script>
+		<script src="js/reveal.js"></script>
+
+		<script>
+			// More info about config & dependencies:
+			// - https://github.com/hakimel/reveal.js#configuration
+			// - https://github.com/hakimel/reveal.js#dependencies
+			Reveal.initialize({
+				dependencies: [
+					{ src: 'plugin/markdown/marked.js' },
+					{ src: 'plugin/markdown/markdown.js' },
+					{ src: 'plugin/notes/notes.js', async: true },
+					{ src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } }
+				]
+			});
+		</script>
+	</body>
+</html>

pres/reveal.js-master/js/reveal.js

+/*!
+ * reveal.js
+ * http://lab.hakim.se/reveal-js
+ * MIT licensed
+ *
+ * Copyright (C) 2017 Hakim El Hattab, http://hakim.se
+ */
+(function( root, factory ) {
+	if( typeof define === 'function' && define.amd ) {
+		// AMD. Register as an anonymous module.
+		define( function() {
+			root.Reveal = factory();
+			return root.Reveal;
+		} );
+	} else if( typeof exports === 'object' ) {
+		// Node. Does not work with strict CommonJS.
+		module.exports = factory();
+	} else {
+		// Browser globals.
+		root.Reveal = factory();
+	}
+}( this, function() {
+
+	'use strict';
+
+	var Reveal;
+
+	// The reveal.js version
+	var VERSION = '3.5.0';
+
+	var SLIDES_SELECTOR = '.slides section',
+		HORIZONTAL_SLIDES_SELECTOR = '.slides>section',
+		VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section',
+		HOME_SLIDE_SELECTOR = '.slides>section:first-of-type',
+		UA = navigator.userAgent,
+
+		// Configuration defaults, can be overridden at initialization time
+		config = {
+
+			// The "normal" size of the presentation, aspect ratio will be preserved
+			// when the presentation is scaled to fit different resolutions
+			width: 960,
+			height: 700,
+
+			// Factor of the display size that should remain empty around the content
+			margin: 0.04,
+
+			// Bounds for smallest/largest possible scale to apply to content
+			minScale: 0.2,
+			maxScale: 2.0,
+
+			// Display controls in the bottom right corner
+			controls: true,
+
+			// Display a presentation progress bar
+			progress: true,
+
+			// Display the page number of the current slide
+			slideNumber: false,
+
+			// Determine which displays to show the slide number on
+			showSlideNumber: 'all',
+
+			// Push each slide change to the browser history
+			history: false,
+
+			// Enable keyboard shortcuts for navigation
+			keyboard: true,
+
+			// Optional function that blocks keyboard events when retuning false
+			keyboardCondition: null,
+
+			// Enable the slide overview mode
+			overview: true,
+
+			// Vertical centering of slides
+			center: true,
+
+			// Enables touch navigation on devices with touch input
+			touch: true,
+
+			// Loop the presentation
+			loop: false,
+
+			// Change the presentation direction to be RTL
+			rtl: false,
+
+			// Randomizes the order of slides each time the presentation loads
+			shuffle: false,
+
+			// Turns fragments on and off globally
+			fragments: true,
+
+			// Flags if the presentation is running in an embedded mode,
+			// i.e. contained within a limited portion of the screen
+			embedded: false,
+
+			// Flags if we should show a help overlay when the question-mark
+			// key is pressed
+			help: true,
+
+			// Flags if it should be possible to pause the presentation (blackout)
+			pause: true,
+
+			// Flags if speaker notes should be visible to all viewers
+			showNotes: false,
+
+			// Global override for autolaying embedded media (video/audio/iframe)
+			// - null: Media will only autoplay if data-autoplay is present
+			// - true: All media will autoplay, regardless of individual setting
+			// - false: No media will autoplay, regardless of individual setting
+			autoPlayMedia: null,
+
+			// Number of milliseconds between automatically proceeding to the
+			// next slide, disabled when set to 0, this value can be overwritten
+			// by using a data-autoslide attribute on your slides
+			autoSlide: 0,
+
+			// Stop auto-sliding after user input
+			autoSlideStoppable: true,
+
+			// Use this method for navigation when auto-sliding (defaults to navigateNext)
+			autoSlideMethod: null,
+
+			// Enable slide navigation via mouse wheel
+			mouseWheel: false,
+
+			// Apply a 3D roll to links on hover
+			rollingLinks: false,
+
+			// Hides the address bar on mobile devices
+			hideAddressBar: true,
+
+			// Opens links in an iframe preview overlay
+			previewLinks: false,
+
+			// Exposes the reveal.js API through window.postMessage
+			postMessage: true,
+
+			// Dispatches all reveal.js events to the parent window through postMessage
+			postMessageEvents: false,
+
+			// Focuses body when page changes visibility to ensure keyboard shortcuts work
+			focusBodyOnPageVisibilityChange: true,
+
+			// Transition style
+			transition: 'slide', // none/fade/slide/convex/concave/zoom
+
+			// Transition speed
+			transitionSpeed: 'default', // default/fast/slow
+
+			// Transition style for full page slide backgrounds
+			backgroundTransition: 'fade', // none/fade/slide/convex/concave/zoom
+
+			// Parallax background image
+			parallaxBackgroundImage: '', // CSS syntax, e.g. "a.jpg"
+
+			// Parallax background size
+			parallaxBackgroundSize: '', // CSS syntax, e.g. "3000px 2000px"
+
+			// Amount of pixels to move the parallax background per slide step
+			parallaxBackgroundHorizontal: null,
+			parallaxBackgroundVertical: null,
+
+			// The maximum number of pages a single slide can expand onto when printing
+			// to PDF, unlimited by default
+			pdfMaxPagesPerSlide: Number.POSITIVE_INFINITY,
+
+			// Offset used to reduce the height of content within exported PDF pages.
+			// This exists to account for environment differences based on how you
+			// print to PDF. CLI printing options, like phantomjs and wkpdf, can end
+			// on precisely the total height of the document whereas in-browser
+			// printing has to end one pixel before.
+			pdfPageHeightOffset: -1,
+
+			// Number of slides away from the current that are visible
+			viewDistance: 3,
+
+			// The display mode that will be used to show slides
+			display: 'block',
+
+			// Script dependencies to load
+			dependencies: []
+
+		},
+
+		// Flags if Reveal.initialize() has been called
+		initialized = false,
+
+		// Flags if reveal.js is loaded (has dispatched the 'ready' event)
+		loaded = false,
+
+		// Flags if the overview mode is currently active
+		overview = false,
+
+		// Holds the dimensions of our overview slides, including margins
+		overviewSlideWidth = null,
+		overviewSlideHeight = null,
+
+		// The horizontal and vertical index of the currently active slide
+		indexh,
+		indexv,
+
+		// The previous and current slide HTML elements
+		previousSlide,
+		currentSlide,
+
+		previousBackground,
+
+		// Slides may hold a data-state attribute which we pick up and apply
+		// as a class to the body. This list contains the combined state of
+		// all current slides.
+		state = [],
+
+		// The current scale of the presentation (see width/height config)
+		scale = 1,
+
+		// CSS transform that is currently applied to the slides container,
+		// split into two groups
+		slidesTransform = { layout: '', overview: '' },
+
+		// Cached references to DOM elements
+		dom = {},
+
+		// Features supported by the browser, see #checkCapabilities()
+		features = {},
+
+		// Client is a mobile device, see #checkCapabilities()
+		isMobileDevice,
+
+		// Client is a desktop Chrome, see #checkCapabilities()
+		isChrome,
+
+		// Throttles mouse wheel navigation
+		lastMouseWheelStep = 0,
+
+		// Delays updates to the URL due to a Chrome thumbnailer bug
+		writeURLTimeout = 0,
+
+		// Flags if the interaction event listeners are bound
+		eventsAreBound = false,
+
+		// The current auto-slide duration
+		autoSlide = 0,
+
+		// Auto slide properties
+		autoSlidePlayer,
+		autoSlideTimeout = 0,
+		autoSlideStartTime = -1,
+		autoSlidePaused = false,
+
+		// Holds information about the currently ongoing touch input
+		touch = {
+			startX: 0,
+			startY: 0,
+			startSpan: 0,
+			startCount: 0,
+			captured: false,
+			threshold: 40
+		},
+
+		// Holds information about the keyboard shortcuts
+		keyboardShortcuts = {
+			'N  ,  SPACE':			'Next slide',
+			'P':					'Previous slide',
+			'←  ,  H':		'Navigate left',
+			'→  ,  L':		'Navigate right',
+			'↑  ,  K':		'Navigate up',
+			'↓  ,  J':		'Navigate down',
+			'Home':					'First slide',
+			'End':					'Last slide',
+			'B  ,  .':				'Pause',
+			'F':					'Fullscreen',
+			'ESC, O':				'Slide overview'
+		};
+
+	/**
+	 * Starts up the presentation if the client is capable.
+	 */
+	function initialize( options ) {
+
+		// Make sure we only initialize once
+		if( initialized === true ) return;
+
+		initialized = true;
+
+		checkCapabilities();
+
+		if( !features.transforms2d && !features.transforms3d ) {
+			document.body.setAttribute( 'class', 'no-transforms' );
+
+			// Since JS won't be running any further, we load all lazy
+			// loading elements upfront
+			var images = toArray( document.getElementsByTagName( 'img' ) ),
+				iframes = toArray( document.getElementsByTagName( 'iframe' ) );
+
+			var lazyLoadable = images.concat( iframes );
+
+			for( var i = 0, len = lazyLoadable.length; i < len; i++ ) {
+				var element = lazyLoadable[i];
+				if( element.getAttribute( 'data-src' ) ) {
+					element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
+					element.removeAttribute( 'data-src' );
+				}
+			}
+
+			// If the browser doesn't support core features we won't be
+			// using JavaScript to control the presentation
+			return;
+		}
+
+		// Cache references to key DOM elements
+		dom.wrapper = document.querySelector( '.reveal' );
+		dom.slides = document.querySelector( '.reveal .slides' );
+
+		// Force a layout when the whole page, incl fonts, has loaded
+		window.addEventListener( 'load', layout, false );
+
+		var query = Reveal.getQueryHash();
+
+		// Do not accept new dependencies via query config to avoid
+		// the potential of malicious script injection
+		if( typeof query['dependencies'] !== 'undefined' ) delete query['dependencies'];
+
+		// Copy options over to our config object
+		extend( config, options );
+		extend( config, query );
+
+		// Hide the address bar in mobile browsers
+		hideAddressBar();
+
+		// Loads the dependencies and continues to #start() once done
+		load();
+
+	}
+
+	/**
+	 * Inspect the client to see what it's capable of, this
+	 * should only happens once per runtime.
+	 */
+	function checkCapabilities() {
+
+		isMobileDevice = /(iphone|ipod|ipad|android)/gi.test( UA );
+		isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );
+
+		var testElement = document.createElement( 'div' );
+
+		features.transforms3d = 'WebkitPerspective' in testElement.style ||
+								'MozPerspective' in testElement.style ||
+								'msPerspective' in testElement.style ||
+								'OPerspective' in testElement.style ||
+								'perspective' in testElement.style;
+
+		features.transforms2d = 'WebkitTransform' in testElement.style ||
+								'MozTransform' in testElement.style ||
+								'msTransform' in testElement.style ||
+								'OTransform' in testElement.style ||
+								'transform' in testElement.style;
+
+		features.requestAnimationFrameMethod = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame;
+		features.requestAnimationFrame = typeof features.requestAnimationFrameMethod === 'function';
+
+		features.canvas = !!document.createElement( 'canvas' ).getContext;
+
+		// Transitions in the overview are disabled in desktop and
+		// Safari due to lag
+		features.overviewTransitions = !/Version\/[\d\.]+.*Safari/.test( UA );
+
+		// Flags if we should use zoom instead of transform to scale
+		// up slides. Zoom produces crisper results but has a lot of
+		// xbrowser quirks so we only use it in whitelsited browsers.
+		features.zoom = 'zoom' in testElement.style && !isMobileDevice &&
+						( isChrome || /Version\/[\d\.]+.*Safari/.test( UA ) );
+
+	}
+
+    /**
+     * Loads the dependencies of reveal.js. Dependencies are
+     * defined via the configuration option 'dependencies'
+     * and will be loaded prior to starting/binding reveal.js.
+     * Some dependencies may have an 'async' flag, if so they
+     * will load after reveal.js has been started up.
+     */
+	function load() {
+
+		var scripts = [],
+			scriptsAsync = [],
+			scriptsToPreload = 0;
+
+		// Called once synchronous scripts finish loading
+		function proceed() {
+			if( scriptsAsync.length ) {
+				// Load asynchronous scripts
+				head.js.apply( null, scriptsAsync );
+			}
+
+			start();
+		}
+
+		function loadScript( s ) {
+			head.ready( s.src.match( /([\w\d_\-]*)\.?js$|[^\\\/]*$/i )[0], function() {
+				// Extension may contain callback functions
+				if( typeof s.callback === 'function' ) {
+					s.callback.apply( this );
+				}
+
+				if( --scriptsToPreload === 0 ) {
+					proceed();
+				}
+			});
+		}
+
+		for( var i = 0, len = config.dependencies.length; i < len; i++ ) {
+			var s = config.dependencies[i];
+
+			// Load if there's no condition or the condition is truthy
+			if( !s.condition || s.condition() ) {
+				if( s.async ) {
+					scriptsAsync.push( s.src );
+				}
+				else {
+					scripts.push( s.src );
+				}
+
+				loadScript( s );
+			}
+		}
+
+		if( scripts.length ) {
+			scriptsToPreload = scripts.length;
+
+			// Load synchronous scripts
+			head.js.apply( null, scripts );
+		}
+		else {
+			proceed();
+		}
+
+	}
+
+	/**
+	 * Starts up reveal.js by binding input events and navigating
+	 * to the current URL deeplink if there is one.
+	 */
+	function start() {
+
+		// Make sure we've got all the DOM elements we need
+		setupDOM();
+
+		// Listen to messages posted to this window
+		setupPostMessage();
+
+		// Prevent the slides from being scrolled out of view
+		setupScrollPrevention();
+
+		// Resets all vertical slides so that only the first is visible
+		resetVerticalSlides();
+
+		// Updates the presentation to match the current configuration values
+		configure();
+
+		// Read the initial hash
+		readURL();
+
+		// Update all backgrounds
+		updateBackground( true );
+
+		// Notify listeners that the presentation is ready but use a 1ms
+		// timeout to ensure it's not fired synchronously after #initialize()
+		setTimeout( function() {
+			// Enable transitions now that we're loaded
+			dom.slides.classList.remove( 'no-transition' );
+
+			loaded = true;
+
+			dom.wrapper.classList.add( 'ready' );
+
+			dispatchEvent( 'ready', {
+				'indexh': indexh,
+				'indexv': indexv,
+				'currentSlide': currentSlide
+			} );
+		}, 1 );
+
+		// Special setup and config is required when printing to PDF
+		if( isPrintingPDF() ) {
+			removeEventListeners();
+
+			// The document needs to have loaded for the PDF layout
+			// measurements to be accurate
+			if( document.readyState === 'complete' ) {
+				setupPDF();
+			}
+			else {
+				window.addEventListener( 'load', setupPDF );
+			}
+		}
+
+	}
+
+	/**
+	 * Finds and stores references to DOM elements which are
+	 * required by the presentation. If a required element is
+	 * not found, it is created.
+	 */
+	function setupDOM() {
+
+		// Prevent transitions while we're loading
+		dom.slides.classList.add( 'no-transition' );
+
+		// Background element
+		dom.background = createSingletonNode( dom.wrapper, 'div', 'backgrounds', null );
+
+		// Progress bar
+		dom.progress = createSingletonNode( dom.wrapper, 'div', 'progress', '<span></span>' );
+		dom.progressbar = dom.progress.querySelector( 'span' );
+
+		// Arrow controls
+		createSingletonNode( dom.wrapper, 'aside', 'controls',
+			'<button class="navigate-left" aria-label="previous slide"></button>' +
+			'<button class="navigate-right" aria-label="next slide"></button>' +
+			'<button class="navigate-up" aria-label="above slide"></button>' +
+			'<button class="navigate-down" aria-label="below slide"></button>' );
+
+		// Slide number
+		dom.slideNumber = createSingletonNode( dom.wrapper, 'div', 'slide-number', '' );
+
+		// Element containing notes that are visible to the audience
+		dom.speakerNotes = createSingletonNode( dom.wrapper, 'div', 'speaker-notes', null );
+		dom.speakerNotes.setAttribute( 'data-prevent-swipe', '' );
+		dom.speakerNotes.setAttribute( 'tabindex', '0' );
+
+		// Overlay graphic which is displayed during the paused mode
+		createSingletonNode( dom.wrapper, 'div', 'pause-overlay', null );
+
+		// Cache references to elements
+		dom.controls = document.querySelector( '.reveal .controls' );
+
+		dom.wrapper.setAttribute( 'role', 'application' );
+
+		// There can be multiple instances of controls throughout the page
+		dom.controlsLeft = toArray( document.querySelectorAll( '.navigate-left' ) );
+		dom.controlsRight = toArray( document.querySelectorAll( '.navigate-right' ) );
+		dom.controlsUp = toArray( document.querySelectorAll( '.navigate-up' ) );
+		dom.controlsDown = toArray( document.querySelectorAll( '.navigate-down' ) );
+		dom.controlsPrev = toArray( document.querySelectorAll( '.navigate-prev' ) );
+		dom.controlsNext = toArray( document.querySelectorAll( '.navigate-next' ) );
+
+		dom.statusDiv = createStatusDiv();
+	}
+
+	/**
+	 * Creates a hidden div with role aria-live to announce the
+	 * current slide content. Hide the div off-screen to make it
+	 * available only to Assistive Technologies.
+	 *
+	 * @return {HTMLElement}
+	 */
+	function createStatusDiv() {
+
+		var statusDiv = document.getElementById( 'aria-status-div' );
+		if( !statusDiv ) {
+			statusDiv = document.createElement( 'div' );
+			statusDiv.style.position = 'absolute';
+			statusDiv.style.height = '1px';
+			statusDiv.style.width = '1px';
+			statusDiv.style.overflow = 'hidden';
+			statusDiv.style.clip = 'rect( 1px, 1px, 1px, 1px )';
+			statusDiv.setAttribute( 'id', 'aria-status-div' );
+			statusDiv.setAttribute( 'aria-live', 'polite' );
+			statusDiv.setAttribute( 'aria-atomic','true' );
+			dom.wrapper.appendChild( statusDiv );
+		}
+		return statusDiv;
+
+	}
+
+	/**
+	 * Converts the given HTML element into a string of text
+	 * that can be announced to a screen reader. Hidden
+	 * elements are excluded.
+	 */
+	function getStatusText( node ) {
+
+		var text = '';
+
+		// Text node
+		if( node.nodeType === 3 ) {
+			text += node.textContent;
+		}
+		// Element node
+		else if( node.nodeType === 1 ) {
+
+			var isAriaHidden = node.getAttribute( 'aria-hidden' );
+			var isDisplayHidden = window.getComputedStyle( node )['display'] === 'none';
+			if( isAriaHidden !== 'true' && !isDisplayHidden ) {
+
+				toArray( node.childNodes ).forEach( function( child ) {
+					text += getStatusText( child );
+				} );
+
+			}
+
+		}
+
+		return text;
+
+	}
+
+	/**
+	 * Configures the presentation for printing to a static
+	 * PDF.
+	 */
+	function setupPDF() {
+
+		var slideSize = getComputedSlideSize( window.innerWidth, window.innerHeight );
+
+		// Dimensions of the PDF pages
+		var pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),
+			pageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );
+
+		// Dimensions of slides within the pages
+		var slideWidth = slideSize.width,
+			slideHeight = slideSize.height;
+
+		// Let the browser know what page size we want to print
+		injectStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );
+
+		// Limit the size of certain elements to the dimensions of the slide
+		injectStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );
+
+		document.body.classList.add( 'print-pdf' );
+		document.body.style.width = pageWidth + 'px';
+		document.body.style.height = pageHeight + 'px';
+
+		// Make sure stretch elements fit on slide
+		layoutSlideContents( slideWidth, slideHeight );
+
+		// Add each slide's index as attributes on itself, we need these
+		// indices to generate slide numbers below
+		toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( hslide, h ) {
+			hslide.setAttribute( 'data-index-h', h );
+
+			if( hslide.classList.contains( 'stack' ) ) {
+				toArray( hslide.querySelectorAll( 'section' ) ).forEach( function( vslide, v ) {
+					vslide.setAttribute( 'data-index-h', h );
+					vslide.setAttribute( 'data-index-v', v );
+				} );
+			}
+		} );
+
+		// Slide and slide background layout
+		toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
+
+			// Vertical stacks are not centred since their section
+			// children will be
+			if( slide.classList.contains( 'stack' ) === false ) {
+				// Center the slide inside of the page, giving the slide some margin
+				var left = ( pageWidth - slideWidth ) / 2,
+					top = ( pageHeight - slideHeight ) / 2;
+
+				var contentHeight = slide.scrollHeight;
+				var numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );
+
+				// Adhere to configured pages per slide limit
+				numberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );
+
+				// Center slides vertically
+				if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {
+					top = Math.max( ( pageHeight - contentHeight ) / 2, 0 );
+				}
+
+				// Wrap the slide in a page element and hide its overflow
+				// so that no page ever flows onto another
+				var page = document.createElement( 'div' );
+				page.className = 'pdf-page';
+				page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';
+				slide.parentNode.insertBefore( page, slide );
+				page.appendChild( slide );
+
+				// Position the slide inside of the page
+				slide.style.left = left + 'px';
+				slide.style.top = top + 'px';
+				slide.style.width = slideWidth + 'px';
+
+				if( slide.slideBackgroundElement ) {
+					page.insertBefore( slide.slideBackgroundElement, slide );
+				}
+
+				// Inject notes if `showNotes` is enabled
+				if( config.showNotes ) {
+
+					// Are there notes for this slide?
+					var notes = getSlideNotes( slide );
+					if( notes ) {
+
+						var notesSpacing = 8;
+						var notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
+						var notesElement = document.createElement( 'div' );
+						notesElement.classList.add( 'speaker-notes' );
+						notesElement.classList.add( 'speaker-notes-pdf' );
+						notesElement.setAttribute( 'data-layout', notesLayout );
+						notesElement.innerHTML = notes;
+
+						if( notesLayout === 'separate-page' ) {
+							page.parentNode.insertBefore( notesElement, page.nextSibling );
+						}
+						else {
+							notesElement.style.left = notesSpacing + 'px';
+							notesElement.style.bottom = notesSpacing + 'px';
+							notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';
+							page.appendChild( notesElement );
+						}
+
+					}
+
+				}
+
+				// Inject slide numbers if `slideNumbers` are enabled
+				if( config.slideNumber && /all|print/i.test( config.showSlideNumber ) ) {
+					var slideNumberH = parseInt( slide.getAttribute( 'data-index-h' ), 10 ) + 1,
+						slideNumberV = parseInt( slide.getAttribute( 'data-index-v' ), 10 ) + 1;
+
+					var numberElement = document.createElement( 'div' );
+					numberElement.classList.add( 'slide-number' );
+					numberElement.classList.add( 'slide-number-pdf' );
+					numberElement.innerHTML = formatSlideNumber( slideNumberH, '.', slideNumberV );
+					page.appendChild( numberElement );
+				}
+			}
+
+		} );
+
+		// Show all fragments
+		toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ' .fragment' ) ).forEach( function( fragment ) {
+			fragment.classList.add( 'visible' );
+		} );
+
+		// Notify subscribers that the PDF layout is good to go
+		dispatchEvent( 'pdf-ready' );
+
+	}
+
+	/**
+	 * This is an unfortunate necessity. Some actions – such as
+	 * an input field being focused in an iframe or using the
+	 * keyboard to expand text selection beyond the bounds of
+	 * a slide – can trigger our content to be pushed out of view.
+	 * This scrolling can not be prevented by hiding overflow in
+	 * CSS (we already do) so we have to resort to repeatedly
+	 * checking if the slides have been offset :(
+	 */
+	function setupScrollPrevention() {
+
+		setInterval( function() {
+			if( dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {
+				dom.wrapper.scrollTop = 0;
+				dom.wrapper.scrollLeft = 0;
+			}
+		}, 1000 );
+
+	}
+
+	/**
+	 * Creates an HTML element and returns a reference to it.
+	 * If the element already exists the existing instance will
+	 * be returned.
+	 *
+	 * @param {HTMLElement} container
+	 * @param {string} tagname
+	 * @param {string} classname
+	 * @param {string} innerHTML
+	 *
+	 * @return {HTMLElement}
+	 */
+	function createSingletonNode( container, tagname, classname, innerHTML ) {
+
+		// Find all nodes matching the description
+		var nodes = container.querySelectorAll( '.' + classname );
+
+		// Check all matches to find one which is a direct child of
+		// the specified container
+		for( var i = 0; i < nodes.length; i++ ) {
+			var testNode = nodes[i];
+			if( testNode.parentNode === container ) {
+				return testNode;
+			}
+		}
+
+		// If no node was found, create it now
+		var node = document.createElement( tagname );
+		node.classList.add( classname );
+		if( typeof innerHTML === 'string' ) {
+			node.innerHTML = innerHTML;
+		}
+		container.appendChild( node );
+
+		return node;
+
+	}
+
+	/**
+	 * Creates the slide background elements and appends them
+	 * to the background container. One element is created per
+	 * slide no matter if the given slide has visible background.
+	 */
+	function createBackgrounds() {
+
+		var printMode = isPrintingPDF();
+
+		// Clear prior backgrounds
+		dom.background.innerHTML = '';
+		dom.background.classList.add( 'no-transition' );
+
+		// Iterate over all horizontal slides
+		toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( slideh ) {
+
+			var backgroundStack = createBackground( slideh, dom.background );
+
+			// Iterate over all vertical slides
+			toArray( slideh.querySelectorAll( 'section' ) ).forEach( function( slidev ) {
+
+				createBackground( slidev, backgroundStack );
+
+				backgroundStack.classList.add( 'stack' );
+
+			} );
+
+		} );
+
+		// Add parallax background if specified
+		if( config.parallaxBackgroundImage ) {
+
+			dom.background.style.backgroundImage = 'url("' + config.parallaxBackgroundImage + '")';
+			dom.background.style.backgroundSize = config.parallaxBackgroundSize;
+
+			// Make sure the below properties are set on the element - these properties are
+			// needed for proper transitions to be set on the element via CSS. To remove
+			// annoying background slide-in effect when the presentation starts, apply
+			// these properties after short time delay
+			setTimeout( function() {
+				dom.wrapper.classList.add( 'has-parallax-background' );
+			}, 1 );
+
+		}
+		else {
+
+			dom.background.style.backgroundImage = '';
+			dom.wrapper.classList.remove( 'has-parallax-background' );
+
+		}
+
+	}
+
+	/**
+	 * Creates a background for the given slide.
+	 *
+	 * @param {HTMLElement} slide
+	 * @param {HTMLElement} container The element that the background
+	 * should be appended to
+	 * @return {HTMLElement} New background div
+	 */
+	function createBackground( slide, container ) {
+
+		var data = {
+			background: slide.getAttribute( 'data-background' ),
+			backgroundSize: slide.getAttribute( 'data-background-size' ),
+			backgroundImage: slide.getAttribute( 'data-background-image' ),
+			backgroundVideo: slide.getAttribute( 'data-background-video' ),
+			backgroundIframe: slide.getAttribute( 'data-background-iframe' ),
+			backgroundColor: slide.getAttribute( 'data-background-color' ),
+			backgroundRepeat: slide.getAttribute( 'data-background-repeat' ),
+			backgroundPosition: slide.getAttribute( 'data-background-position' ),
+			backgroundTransition: slide.getAttribute( 'data-background-transition' )
+		};
+
+		var element = document.createElement( 'div' );
+
+		// Carry over custom classes from the slide to the background
+		element.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' );
+
+		if( data.background ) {
+			// Auto-wrap image urls in url(...)
+			if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp)([?#]|$)/gi.test( data.background ) ) {
+				slide.setAttribute( 'data-background-image', data.background );
+			}
+			else {
+				element.style.background = data.background;
+			}
+		}
+
+		// Create a hash for this combination of background settings.
+		// This is used to determine when two slide backgrounds are
+		// the same.
+		if( data.background || data.backgroundColor || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {
+			element.setAttribute( 'data-background-hash', data.background +
+															data.backgroundSize +
+															data.backgroundImage +
+															data.backgroundVideo +
+															data.backgroundIframe +
+															data.backgroundColor +
+															data.backgroundRepeat +
+															data.backgroundPosition +
+															data.backgroundTransition );
+		}
+
+		// Additional and optional background properties
+		if( data.backgroundSize ) element.style.backgroundSize = data.backgroundSize;
+		if( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize );
+		if( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor;
+		if( data.backgroundRepeat ) element.style.backgroundRepeat = data.backgroundRepeat;
+		if( data.backgroundPosition ) element.style.backgroundPosition = data.backgroundPosition;
+		if( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );
+
+		container.appendChild( element );
+
+		// If backgrounds are being recreated, clear old classes
+		slide.classList.remove( 'has-dark-background' );
+		slide.classList.remove( 'has-light-background' );
+
+		slide.slideBackgroundElement = element;
+
+		// If this slide has a background color, add a class that
+		// signals if it is light or dark. If the slide has no background
+		// color, no class will be set
+		var computedBackgroundStyle = window.getComputedStyle( element );
+		if( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {
+			var rgb = colorToRgb( computedBackgroundStyle.backgroundColor );
+
+			// Ignore fully transparent backgrounds. Some browsers return
+			// rgba(0,0,0,0) when reading the computed background color of
+			// an element with no background
+			if( rgb && rgb.a !== 0 ) {
+				if( colorBrightness( computedBackgroundStyle.backgroundColor ) < 128 ) {
+					slide.classList.add( 'has-dark-background' );
+				}
+				else {
+					slide.classList.add( 'has-light-background' );
+				}
+			}
+		}
+
+		return element;
+
+	}
+
+	/**
+	 * Registers a listener to postMessage events, this makes it
+	 * possible to call all reveal.js API methods from another
+	 * window. For example:
+	 *
+	 * revealWindow.postMessage( JSON.stringify({
+	 *   method: 'slide',
+	 *   args: [ 2 ]
+	 * }), '*' );
+	 */
+	function setupPostMessage() {
+
+		if( config.postMessage ) {
+			window.addEventListener( 'message', function ( event ) {
+				var data = event.data;
+
+				// Make sure we're dealing with JSON
+				if( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {
+					data = JSON.parse( data );
+
+					// Check if the requested method can be found
+					if( data.method && typeof Reveal[data.method] === 'function' ) {
+						Reveal[data.method].apply( Reveal, data.args );
+					}
+				}
+			}, false );
+		}
+
+	}
+
+	/**
+	 * Applies the configuration settings from the config
+	 * object. May be called multiple times.
+	 *
+	 * @param {object} options
+	 */
+	function configure( options ) {
+
+		var numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length;
+
+		dom.wrapper.classList.remove( config.transition );
+
+		// New config options may be passed when this method
+		// is invoked through the API after initialization
+		if( typeof options === 'object' ) extend( config, options );
+
+		// Force linear transition based on browser capabilities
+		if( features.transforms3d === false ) config.transition = 'linear';
+
+		dom.wrapper.classList.add( config.transition );
+
+		dom.wrapper.setAttribute( 'data-transition-speed', config.transitionSpeed );
+		dom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition );
+
+		dom.controls.style.display = config.controls ? 'block' : 'none';
+		dom.progress.style.display = config.progress ? 'block' : 'none';
+
+		if( config.shuffle ) {
+			shuffle();
+		}
+
+		if( config.rtl ) {
+			dom.wrapper.classList.add( 'rtl' );
+		}
+		else {
+			dom.wrapper.classList.remove( 'rtl' );
+		}
+
+		if( config.center ) {
+			dom.wrapper.classList.add( 'center' );
+		}
+		else {
+			dom.wrapper.classList.remove( 'center' );
+		}
+
+		// Exit the paused mode if it was configured off
+		if( config.pause === false ) {
+			resume();
+		}
+
+		if( config.showNotes ) {
+			dom.speakerNotes.classList.add( 'visible' );
+			dom.speakerNotes.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' );
+		}
+		else {
+			dom.speakerNotes.classList.remove( 'visible' );
+		}
+
+		if( config.mouseWheel ) {
+			document.addEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
+			document.addEventListener( 'mousewheel', onDocumentMouseScroll, false );
+		}
+		else {
+			document.removeEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
+			document.removeEventListener( 'mousewheel', onDocumentMouseScroll, false );
+		}
+
+		// Rolling 3D links
+		if( config.rollingLinks ) {
+			enableRollingLinks();
+		}
+		else {
+			disableRollingLinks();
+		}
+
+		// Iframe link previews
+		if( config.previewLinks ) {
+			enablePreviewLinks();
+			disablePreviewLinks( '[data-preview-link=false]' );
+		}
+		else {
+			disablePreviewLinks();
+			enablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' );
+		}
+
+		// Remove existing auto-slide controls
+		if( autoSlidePlayer ) {
+			autoSlidePlayer.destroy();
+			autoSlidePlayer = null;
+		}
+
+		// Generate auto-slide controls if needed
+		if( numberOfSlides > 1 && config.autoSlide && config.autoSlideStoppable && features.canvas && features.requestAnimationFrame ) {
+			autoSlidePlayer = new Playback( dom.wrapper, function() {
+				return Math.min( Math.max( ( Date.now() - autoSlideStartTime ) / autoSlide, 0 ), 1 );
+			} );
+
+			autoSlidePlayer.on( 'click', onAutoSlidePlayerClick );
+			autoSlidePaused = false;
+		}
+
+		// When fragments are turned off they should be visible
+		if( config.fragments === false ) {
+			toArray( dom.slides.querySelectorAll( '.fragment' ) ).forEach( function( element ) {
+				element.classList.add( 'visible' );
+				element.classList.remove( 'current-fragment' );
+			} );
+		}
+
+		// Slide numbers
+		var slideNumberDisplay = 'none';
+		if( config.slideNumber && !isPrintingPDF() ) {
+			if( config.showSlideNumber === 'all' ) {
+				slideNumberDisplay = 'block';
+			}
+			else if( config.showSlideNumber === 'speaker' && isSpeakerNotes() ) {
+				slideNumberDisplay = 'block';
+			}
+		}
+
+		dom.slideNumber.style.display = slideNumberDisplay;
+
+		sync();
+
+	}
+
+	/**
+	 * Binds all event listeners.
+	 */
+	function addEventListeners() {
+
+		eventsAreBound = true;
+
+		window.addEventListener( 'hashchange', onWindowHashChange, false );
+		window.addEventListener( 'resize', onWindowResize, false );
+
+		if( config.touch ) {
+			dom.wrapper.addEventListener( 'touchstart', onTouchStart, false );
+			dom.wrapper.addEventListener( 'touchmove', onTouchMove, false );
+			dom.wrapper.addEventListener( 'touchend', onTouchEnd, false );
+
+			// Support pointer-style touch interaction as well
+			if( window.navigator.pointerEnabled ) {
+				// IE 11 uses un-prefixed version of pointer events
+				dom.wrapper.addEventListener( 'pointerdown', onPointerDown, false );
+				dom.wrapper.addEventListener( 'pointermove', onPointerMove, false );
+				dom.wrapper.addEventListener( 'pointerup', onPointerUp, false );
+			}
+			else if( window.navigator.msPointerEnabled ) {
+				// IE 10 uses prefixed version of pointer events
+				dom.wrapper.addEventListener( 'MSPointerDown', onPointerDown, false );
+				dom.wrapper.addEventListener( 'MSPointerMove', onPointerMove, false );
+				dom.wrapper.addEventListener( 'MSPointerUp', onPointerUp, false );
+			}
+		}
+
+		if( config.keyboard ) {
+			document.addEventListener( 'keydown', onDocumentKeyDown, false );
+			document.addEventListener( 'keypress', onDocumentKeyPress, false );
+		}
+
+		if( config.progress && dom.progress ) {
+			dom.progress.addEventListener( 'click', onProgressClicked, false );
+		}
+
+		if( config.focusBodyOnPageVisibilityChange ) {
+			var visibilityChange;
+
+			if( 'hidden' in document ) {
+				visibilityChange = 'visibilitychange';
+			}
+			else if( 'msHidden' in document ) {
+				visibilityChange = 'msvisibilitychange';
+			}
+			else if( 'webkitHidden' in document ) {
+				visibilityChange = 'webkitvisibilitychange';
+			}
+
+			if( visibilityChange ) {
+				document.addEventListener( visibilityChange, onPageVisibilityChange, false );
+			}
+		}
+
+		// Listen to both touch and click events, in case the device
+		// supports both
+		var pointerEvents = [ 'touchstart', 'click' ];
+
+		// Only support touch for Android, fixes double navigations in
+		// stock browser
+		if( UA.match( /android/gi ) ) {
+			pointerEvents = [ 'touchstart' ];
+		}
+
+		pointerEvents.forEach( function( eventName ) {
+			dom.controlsLeft.forEach( function( el ) { el.addEventListener( eventName, onNavigateLeftClicked, false ); } );
+			dom.controlsRight.forEach( function( el ) { el.addEventListener( eventName, onNavigateRightClicked, false ); } );
+			dom.controlsUp.forEach( function( el ) { el.addEventListener( eventName, onNavigateUpClicked, false ); } );
+			dom.controlsDown.forEach( function( el ) { el.addEventListener( eventName, onNavigateDownClicked, false ); } );
+			dom.controlsPrev.forEach( function( el ) { el.addEventListener( eventName, onNavigatePrevClicked, false ); } );
+			dom.controlsNext.forEach( function( el ) { el.addEventListener( eventName, onNavigateNextClicked, false ); } );
+		} );
+
+	}
+
+	/**
+	 * Unbinds all event listeners.
+	 */
+	function removeEventListeners() {
+
+		eventsAreBound = false;
+
+		document.removeEventListener( 'keydown', onDocumentKeyDown, false );
+		document.removeEventListener( 'keypress', onDocumentKeyPress, false );
+		window.removeEventListener( 'hashchange', onWindowHashChange, false );
+		window.removeEventListener( 'resize', onWindowResize, false );
+
+		dom.wrapper.removeEventListener( 'touchstart', onTouchStart, false );
+		dom.wrapper.removeEventListener( 'touchmove', onTouchMove, false );
+		dom.wrapper.removeEventListener( 'touchend', onTouchEnd, false );
+
+		// IE11
+		if( window.navigator.pointerEnabled ) {
+			dom.wrapper.removeEventListener( 'pointerdown', onPointerDown, false );
+			dom.wrapper.removeEventListener( 'pointermove', onPointerMove, false );
+			dom.wrapper.removeEventListener( 'pointerup', onPointerUp, false );
+		}
+		// IE10
+		else if( window.navigator.msPointerEnabled ) {
+			dom.wrapper.removeEventListener( 'MSPointerDown', onPointerDown, false );
+			dom.wrapper.removeEventListener( 'MSPointerMove', onPointerMove, false );
+			dom.wrapper.removeEventListener( 'MSPointerUp', onPointerUp, false );
+		}
+
+		if ( config.progress && dom.progress ) {
+			dom.progress.removeEventListener( 'click', onProgressClicked, false );
+		}
+
+		[ 'touchstart', 'click' ].forEach( function( eventName ) {
+			dom.controlsLeft.forEach( function( el ) { el.removeEventListener( eventName, onNavigateLeftClicked, false ); } );
+			dom.controlsRight.forEach( function( el ) { el.removeEventListener( eventName, onNavigateRightClicked, false ); } );
+			dom.controlsUp.forEach( function( el ) { el.removeEventListener( eventName, onNavigateUpClicked, false ); } );
+			dom.controlsDown.forEach( function( el ) { el.removeEventListener( eventName, onNavigateDownClicked, false ); } );
+			dom.controlsPrev.forEach( function( el ) { el.removeEventListener( eventName, onNavigatePrevClicked, false ); } );
+			dom.controlsNext.forEach( function( el ) { el.removeEventListener( eventName, onNavigateNextClicked, false ); } );
+		} );
+
+	}
+
+	/**
+	 * Extend object a with the properties of object b.
+	 * If there's a conflict, object b takes precedence.
+	 *
+	 * @param {object} a
+	 * @param {object} b
+	 */
+	function extend( a, b ) {
+
+		for( var i in b ) {
+			a[ i ] = b[ i ];
+		}
+
+	}
+
+	/**
+	 * Converts the target object to an array.
+	 *
+	 * @param {object} o
+	 * @return {object[]}
+	 */
+	function toArray( o ) {
+
+		return Array.prototype.slice.call( o );
+
+	}
+
+	/**
+	 * Utility for deserializing a value.
+	 *
+	 * @param {*} value
+	 * @return {*}
+	 */
+	function deserialize( value ) {
+
+		if( typeof value === 'string' ) {
+			if( value === 'null' ) return null;
+			else if( value === 'true' ) return true;
+			else if( value === 'false' ) return false;
+			else if( value.match( /^[\d\.]+$/ ) ) return parseFloat( value );
+		}
+
+		return value;
+
+	}
+
+	/**
+	 * Measures the distance in pixels between point a
+	 * and point b.
+	 *
+	 * @param {object} a point with x/y properties
+	 * @param {object} b point with x/y properties
+	 *
+	 * @return {number}
+	 */
+	function distanceBetween( a, b ) {
+
+		var dx = a.x - b.x,
+			dy = a.y - b.y;
+
+		return Math.sqrt( dx*dx + dy*dy );
+
+	}
+
+	/**
+	 * Applies a CSS transform to the target element.
+	 *
+	 * @param {HTMLElement} element
+	 * @param {string} transform
+	 */
+	function transformElement( element, transform ) {
+
+		element.style.WebkitTransform = transform;
+		element.style.MozTransform = transform;
+		element.style.msTransform = transform;
+		element.style.transform = transform;
+
+	}
+
+	/**
+	 * Applies CSS transforms to the slides container. The container
+	 * is transformed from two separate sources: layout and the overview
+	 * mode.
+	 *
+	 * @param {object} transforms
+	 */
+	function transformSlides( transforms ) {
+
+		// Pick up new transforms from arguments
+		if( typeof transforms.layout === 'string' ) slidesTransform.layout = transforms.layout;
+		if( typeof transforms.overview === 'string' ) slidesTransform.overview = transforms.overview;
+
+		// Apply the transforms to the slides container
+		if( slidesTransform.layout ) {
+			transformElement( dom.slides, slidesTransform.layout + ' ' + slidesTransform.overview );
+		}
+		else {
+			transformElement( dom.slides, slidesTransform.overview );
+		}
+
+	}
+
+	/**
+	 * Injects the given CSS styles into the DOM.
+	 *
+	 * @param {string} value
+	 */
+	function injectStyleSheet( value ) {
+
+		var tag = document.createElement( 'style' );
+		tag.type = 'text/css';
+		if( tag.styleSheet ) {
+			tag.styleSheet.cssText = value;
+		}
+		else {
+			tag.appendChild( document.createTextNode( value ) );
+		}
+		document.getElementsByTagName( 'head' )[0].appendChild( tag );
+
+	}
+
+	/**
+	 * Find the closest parent that matches the given
+	 * selector.
+	 *
+	 * @param {HTMLElement} target The child element
+	 * @param {String} selector The CSS selector to match
+	 * the parents against
+	 *
+	 * @return {HTMLElement} The matched parent or null
+	 * if no matching parent was found
+	 */
+	function closestParent( target, selector ) {
+
+		var parent = target.parentNode;
+
+		while( parent ) {
+
+			// There's some overhead doing this each time, we don't
+			// want to rewrite the element prototype but should still
+			// be enough to feature detect once at startup...
+			var matchesMethod = parent.matches || parent.matchesSelector || parent.msMatchesSelector;
+
+			// If we find a match, we're all set
+			if( matchesMethod && matchesMethod.call( parent, selector ) ) {
+				return parent;
+			}
+
+			// Keep searching
+			parent = parent.parentNode;
+
+		}
+
+		return null;
+
+	}
+
+	/**
+	 * Converts various color input formats to an {r:0,g:0,b:0} object.
+	 *
+	 * @param {string} color The string representation of a color
+	 * @example
+	 * colorToRgb('#000');
+	 * @example
+	 * colorToRgb('#000000');
+	 * @example
+	 * colorToRgb('rgb(0,0,0)');
+	 * @example
+	 * colorToRgb('rgba(0,0,0)');
+	 *
+	 * @return {{r: number, g: number, b: number, [a]: number}|null}
+	 */
+	function colorToRgb( color ) {
+
+		var hex3 = color.match( /^#([0-9a-f]{3})$/i );
+		if( hex3 && hex3[1] ) {
+			hex3 = hex3[1];
+			return {
+				r: parseInt( hex3.charAt( 0 ), 16 ) * 0x11,
+				g: parseInt( hex3.charAt( 1 ), 16 ) * 0x11,
+				b: parseInt( hex3.charAt( 2 ), 16 ) * 0x11
+			};
+		}
+
+		var hex6 = color.match( /^#([0-9a-f]{6})$/i );
+		if( hex6 && hex6[1] ) {
+			hex6 = hex6[1];
+			return {
+				r: parseInt( hex6.substr( 0, 2 ), 16 ),
+				g: parseInt( hex6.substr( 2, 2 ), 16 ),
+				b: parseInt( hex6.substr( 4, 2 ), 16 )
+			};
+		}
+
+		var rgb = color.match( /^rgb\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$/i );
+		if( rgb ) {
+			return {
+				r: parseInt( rgb[1], 10 ),
+				g: parseInt( rgb[2], 10 ),
+				b: parseInt( rgb[3], 10 )
+			};
+		}
+
+		var rgba = color.match( /^rgba\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\,\s*([\d]+|[\d]*.[\d]+)\s*\)$/i );
+		if( rgba ) {
+			return {
+				r: parseInt( rgba[1], 10 ),
+				g: parseInt( rgba[2], 10 ),
+				b: parseInt( rgba[3], 10 ),
+				a: parseFloat( rgba[4] )
+			};
+		}
+
+		return null;
+
+	}
+
+	/**
+	 * Calculates brightness on a scale of 0-255.
+	 *
+	 * @param {string} color See colorToRgb for supported formats.
+	 * @see {@link colorToRgb}
+	 */
+	function colorBrightness( color ) {
+
+		if( typeof color === 'string' ) color = colorToRgb( color );
+
+		if( color ) {
+			return ( color.r * 299 + color.g * 587 + color.b * 114 ) / 1000;
+		}
+
+		return null;
+
+	}
+
+	/**
+	 * Returns the remaining height within the parent of the
+	 * target element.
+	 *
+	 * remaining height = [ configured parent height ] - [ current parent height ]
+	 *
+	 * @param {HTMLElement} element
+	 * @param {number} [height]
+	 */
+	function getRemainingHeight( element, height ) {
+
+		height = height || 0;
+
+		if( element ) {
+			var newHeight, oldHeight = element.style.height;
+
+			// Change the .stretch element height to 0 in order find the height of all
+			// the other elements
+			element.style.height = '0px';
+			newHeight = height - element.parentNode.offsetHeight;
+
+			// Restore the old height, just in case
+			element.style.height = oldHeight + 'px';
+
+			return newHeight;
+		}
+
+		return height;
+
+	}
+
+	/**
+	 * Checks if this instance is being used to print a PDF.
+	 */
+	function isPrintingPDF() {
+
+		return ( /print-pdf/gi ).test( window.location.search );
+
+	}
+
+	/**
+	 * Hides the address bar if we're on a mobile device.
+	 */
+	function hideAddressBar() {
+
+		if( config.hideAddressBar && isMobileDevice ) {
+			// Events that should trigger the address bar to hide
+			window.addEventListener( 'load', removeAddressBar, false );
+			window.addEventListener( 'orientationchange', removeAddressBar, false );
+		}
+
+	}
+
+	/**
+	 * Causes the address bar to hide on mobile devices,
+	 * more vertical space ftw.
+	 */
+	function removeAddressBar() {
+
+		setTimeout( function() {
+			window.scrollTo( 0, 1 );
+		}, 10 );
+
+	}
+
+	/**
+	 * Dispatches an event of the specified type from the
+	 * reveal DOM element.
+	 */
+	function dispatchEvent( type, args ) {
+
+		var event = document.createEvent( 'HTMLEvents', 1, 2 );
+		event.initEvent( type, true, true );
+		extend( event, args );
+		dom.wrapper.dispatchEvent( event );
+
+		// If we're in an iframe, post each reveal.js event to the
+		// parent window. Used by the notes plugin
+		if( config.postMessageEvents && window.parent !== window.self ) {
+			window.parent.postMessage( JSON.stringify({ namespace: 'reveal', eventName: type, state: getState() }), '*' );
+		}
+
+	}
+
+	/**
+	 * Wrap all links in 3D goodness.
+	 */
+	function enableRollingLinks() {
+
+		if( features.transforms3d && !( 'msPerspective' in document.body.style ) ) {
+			var anchors = dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ' a' );
+
+			for( var i = 0, len = anchors.length; i < len; i++ ) {
+				var anchor = anchors[i];
+
+				if( anchor.textContent && !anchor.querySelector( '*' ) && ( !anchor.className || !anchor.classList.contains( anchor, 'roll' ) ) ) {
+					var span = document.createElement('span');
+					span.setAttribute('data-title', anchor.text);
+					span.innerHTML = anchor.innerHTML;
+
+					anchor.classList.add( 'roll' );
+					anchor.innerHTML = '';
+					anchor.appendChild(span);
+				}
+			}
+		}
+
+	}
+
+	/**
+	 * Unwrap all 3D links.
+	 */
+	function disableRollingLinks() {
+
+		var anchors = dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ' a.roll' );
+
+		for( var i = 0, len = anchors.length; i < len; i++ ) {
+			var anchor = anchors[i];
+			var span = anchor.querySelector( 'span' );
+
+			if( span ) {
+				anchor.classList.remove( 'roll' );
+				anchor.innerHTML = span.innerHTML;
+			}
+		}
+
+	}
+
+	/**
+	 * Bind preview frame links.
+	 *
+	 * @param {string} [selector=a] - selector for anchors
+	 */
+	function enablePreviewLinks( selector ) {
+
+		var anchors = toArray( document.querySelectorAll( selector ? selector : 'a' ) );
+
+		anchors.forEach( function( element ) {
+			if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {
+				element.addEventListener( 'click', onPreviewLinkClicked, false );
+			}
+		} );
+
+	}
+
+	/**
+	 * Unbind preview frame links.
+	 */
+	function disablePreviewLinks( selector ) {
+
+		var anchors = toArray( document.querySelectorAll( selector ? selector : 'a' ) );
+
+		anchors.forEach( function( element ) {
+			if( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {
+				element.removeEventListener( 'click', onPreviewLinkClicked, false );
+			}
+		} );
+
+	}
+
+	/**
+	 * Opens a preview window for the target URL.
+	 *
+	 * @param {string} url - url for preview iframe src
+	 */
+	function showPreview( url ) {
+
+		closeOverlay();
+
+		dom.overlay = document.createElement( 'div' );
+		dom.overlay.classList.add( 'overlay' );
+		dom.overlay.classList.add( 'overlay-preview' );
+		dom.wrapper.appendChild( dom.overlay );
+
+		dom.overlay.innerHTML = [
+			'<header>',
+				'<a class="close" href="#"><span class="icon"></span></a>',
+				'<a class="external" href="'+ url +'" target="_blank"><span class="icon"></span></a>',
+			'</header>',
+			'<div class="spinner"></div>',
+			'<div class="viewport">',
+				'<iframe src="'+ url +'"></iframe>',
+				'<small class="viewport-inner">',
+					'<span class="x-frame-error">Unable to load iframe. This is likely due to the site\'s policy (x-frame-options).</span>',
+				'</small>',
+			'</div>'
+		].join('');
+
+		dom.overlay.querySelector( 'iframe' ).addEventListener( 'load', function( event ) {
+			dom.overlay.classList.add( 'loaded' );
+		}, false );
+
+		dom.overlay.querySelector( '.close' ).addEventListener( 'click', function( event ) {
+			closeOverlay();
+			event.preventDefault();
+		}, false );
+
+		dom.overlay.querySelector( '.external' ).addEventListener( 'click', function( event ) {
+			closeOverlay();
+		}, false );
+
+		setTimeout( function() {
+			dom.overlay.classList.add( 'visible' );
+		}, 1 );
+
+	}
+
+	/**
+	 * Open or close help overlay window.
+	 *
+	 * @param {Boolean} [override] Flag which overrides the
+	 * toggle logic and forcibly sets the desired state. True means
+	 * help is open, false means it's closed.
+	 */
+	function toggleHelp( override ){
+
+		if( typeof override === 'boolean' ) {
+			override ? showHelp() : closeOverlay();
+		}
+		else {
+			if( dom.overlay ) {
+				closeOverlay();
+			}
+			else {
+				showHelp();
+			}
+		}
+	}
+
+	/**
+	 * Opens an overlay window with help material.
+	 */
+	function showHelp() {
+
+		if( config.help ) {
+
+			closeOverlay();
+
+			dom.overlay = document.createElement( 'div' );
+			dom.overlay.classList.add( 'overlay' );
+			dom.overlay.classList.add( 'overlay-help' );
+			dom.wrapper.appendChild( dom.overlay );
+
+			var html = '<p class="title">Keyboard Shortcuts</p><br/>';
+
+			html += '<table><th>KEY</th><th>ACTION</th>';
+			for( var key in keyboardShortcuts ) {
+				html += '<tr><td>' + key + '</td><td>' + keyboardShortcuts[ key ] + '</td></tr>';
+			}
+
+			html += '</table>';
+
+			dom.overlay.innerHTML = [
+				'<header>',
+					'<a class="close" href="#"><span class="icon"></span></a>',
+				'</header>',
+				'<div class="viewport">',
+					'<div class="viewport-inner">'+ html +'</div>',
+				'</div>'
+			].join('');
+
+			dom.overlay.querySelector( '.close' ).addEventListener( 'click', function( event ) {
+				closeOverlay();
+				event.preventDefault();
+			}, false );
+
+			setTimeout( function() {
+				dom.overlay.classList.add( 'visible' );
+			}, 1 );
+
+		}
+
+	}
+
+	/**
+	 * Closes any currently open overlay.
+	 */
+	function closeOverlay() {
+
+		if( dom.overlay ) {
+			dom.overlay.parentNode.removeChild( dom.overlay );
+			dom.overlay = null;
+		}
+
+	}
+
+	/**
+	 * Applies JavaScript-controlled layout rules to the
+	 * presentation.
+	 */
+	function layout() {
+
+		if( dom.wrapper && !isPrintingPDF() ) {
+
+			var size = getComputedSlideSize();
+
+			// Layout the contents of the slides
+			layoutSlideContents( config.width, config.height );
+
+			dom.slides.style.width = size.width + 'px';
+			dom.slides.style.height = size.height + 'px';
+
+			// Determine scale of content to fit within available space
+			scale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height );
+
+			// Respect max/min scale settings
+			scale = Math.max( scale, config.minScale );
+			scale = Math.min( scale, config.maxScale );
+
+			// Don't apply any scaling styles if scale is 1
+			if( scale === 1 ) {
+				dom.slides.style.zoom = '';
+				dom.slides.style.left = '';
+				dom.slides.style.top = '';
+				dom.slides.style.bottom = '';
+				dom.slides.style.right = '';
+				transformSlides( { layout: '' } );
+			}
+			else {
+				// Prefer zoom for scaling up so that content remains crisp.
+				// Don't use zoom to scale down since that can lead to shifts
+				// in text layout/line breaks.
+				if( scale > 1 && features.zoom ) {
+					dom.slides.style.zoom = scale;
+					dom.slides.style.left = '';
+					dom.slides.style.top = '';
+					dom.slides.style.bottom = '';
+					dom.slides.style.right = '';
+					transformSlides( { layout: '' } );
+				}
+				// Apply scale transform as a fallback
+				else {
+					dom.slides.style.zoom = '';
+					dom.slides.style.left = '50%';
+					dom.slides.style.top = '50%';
+					dom.slides.style.bottom = 'auto';
+					dom.slides.style.right = 'auto';
+					transformSlides( { layout: 'translate(-50%, -50%) scale('+ scale +')' } );
+				}
+			}
+
+			// Select all slides, vertical and horizontal
+			var slides = toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) );
+
+			for( var i = 0, len = slides.length; i < len; i++ ) {
+				var slide = slides[ i ];
+
+				// Don't bother updating invisible slides
+				if( slide.style.display === 'none' ) {
+					continue;
+				}
+
+				if( config.center || slide.classList.contains( 'center' ) ) {
+					// Vertical stacks are not centred since their section
+					// children will be
+					if( slide.classList.contains( 'stack' ) ) {
+						slide.style.top = 0;
+					}
+					else {
+						slide.style.top = Math.max( ( size.height - slide.scrollHeight ) / 2, 0 ) + 'px';
+					}
+				}
+				else {
+					slide.style.top = '';
+				}
+
+			}
+
+			updateProgress();
+			updateParallax();
+
+			if( isOverview() ) {
+				updateOverview();
+			}
+
+		}
+
+	}
+
+	/**
+	 * Applies layout logic to the contents of all slides in
+	 * the presentation.
+	 *
+	 * @param {string|number} width
+	 * @param {string|number} height
+	 */
+	function layoutSlideContents( width, height ) {
+
+		// Handle sizing of elements with the 'stretch' class
+		toArray( dom.slides.querySelectorAll( 'section > .stretch' ) ).forEach( function( element ) {
+
+			// Determine how much vertical space we can use
+			var remainingHeight = getRemainingHeight( element, height );
+
+			// Consider the aspect ratio of media elements
+			if( /(img|video)/gi.test( element.nodeName ) ) {
+				var nw = element.naturalWidth || element.videoWidth,
+					nh = element.naturalHeight || element.videoHeight;
+
+				var es = Math.min( width / nw, remainingHeight / nh );
+
+				element.style.width = ( nw * es ) + 'px';
+				element.style.height = ( nh * es ) + 'px';
+
+			}
+			else {
+				element.style.width = width + 'px';
+				element.style.height = remainingHeight + 'px';
+			}
+
+		} );
+
+	}
+
+	/**
+	 * Calculates the computed pixel size of our slides. These
+	 * values are based on the width and height configuration
+	 * options.
+	 *
+	 * @param {number} [presentationWidth=dom.wrapper.offsetWidth]
+	 * @param {number} [presentationHeight=dom.wrapper.offsetHeight]
+	 */
+	function getComputedSlideSize( presentationWidth, presentationHeight ) {
+
+		var size = {
+			// Slide size
+			width: config.width,
+			height: config.height,
+
+			// Presentation size
+			presentationWidth: presentationWidth || dom.wrapper.offsetWidth,
+			presentationHeight: presentationHeight || dom.wrapper.offsetHeight
+		};
+
+		// Reduce available space by margin
+		size.presentationWidth -= ( size.presentationWidth * config.margin );
+		size.presentationHeight -= ( size.presentationHeight * config.margin );
+
+		// Slide width may be a percentage of available width
+		if( typeof size.width === 'string' && /%$/.test( size.width ) ) {
+			size.width = parseInt( size.width, 10 ) / 100 * size.presentationWidth;
+		}
+
+		// Slide height may be a percentage of available height
+		if( typeof size.height === 'string' && /%$/.test( size.height ) ) {
+			size.height = parseInt( size.height, 10 ) / 100 * size.presentationHeight;
+		}
+
+		return size;
+
+	}
+
+	/**
+	 * Stores the vertical index of a stack so that the same
+	 * vertical slide can be selected when navigating to and
+	 * from the stack.
+	 *
+	 * @param {HTMLElement} stack The vertical stack element
+	 * @param {string|number} [v=0] Index to memorize
+	 */
+	function setPreviousVerticalIndex( stack, v ) {
+
+		if( typeof stack === 'object' && typeof stack.setAttribute === 'function' ) {
+			stack.setAttribute( 'data-previous-indexv', v || 0 );
+		}
+
+	}
+
+	/**
+	 * Retrieves the vertical index which was stored using
+	 * #setPreviousVerticalIndex() or 0 if no previous index
+	 * exists.
+	 *
+	 * @param {HTMLElement} stack The vertical stack element
+	 */
+	function getPreviousVerticalIndex( stack ) {
+
+		if( typeof stack === 'object' && typeof stack.setAttribute === 'function' && stack.classList.contains( 'stack' ) ) {
+			// Prefer manually defined start-indexv
+			var attributeName = stack.hasAttribute( 'data-start-indexv' ) ? 'data-start-indexv' : 'data-previous-indexv';
+
+			return parseInt( stack.getAttribute( attributeName ) || 0, 10 );
+		}
+
+		return 0;
+
+	}
+
+	/**
+	 * Displays the overview of slides (quick nav) by scaling
+	 * down and arranging all slide elements.
+	 */
+	function activateOverview() {
+
+		// Only proceed if enabled in config
+		if( config.overview && !isOverview() ) {
+
+			overview = true;
+
+			dom.wrapper.classList.add( 'overview' );
+			dom.wrapper.classList.remove( 'overview-deactivating' );
+
+			if( features.overviewTransitions ) {
+				setTimeout( function() {
+					dom.wrapper.classList.add( 'overview-animated' );
+				}, 1 );
+			}
+
+			// Don't auto-slide while in overview mode
+			cancelAutoSlide();
+
+			// Move the backgrounds element into the slide container to
+			// that the same scaling is applied
+			dom.slides.appendChild( dom.background );
+
+			// Clicking on an overview slide navigates to it
+			toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
+				if( !slide.classList.contains( 'stack' ) ) {
+					slide.addEventListener( 'click', onOverviewSlideClicked, true );
+				}
+			} );
+
+			// Calculate slide sizes
+			var margin = 70;
+			var slideSize = getComputedSlideSize();
+			overviewSlideWidth = slideSize.width + margin;
+			overviewSlideHeight = slideSize.height + margin;
+
+			// Reverse in RTL mode
+			if( config.rtl ) {
+				overviewSlideWidth = -overviewSlideWidth;
+			}
+
+			updateSlidesVisibility();
+			layoutOverview();
+			updateOverview();
+
+			layout();
+
+			// Notify observers of the overview showing
+			dispatchEvent( 'overviewshown', {
+				'indexh': indexh,
+				'indexv': indexv,
+				'currentSlide': currentSlide
+			} );
+
+		}
+
+	}
+
+	/**
+	 * Uses CSS transforms to position all slides in a grid for
+	 * display inside of the overview mode.
+	 */
+	function layoutOverview() {
+
+		// Layout slides
+		toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( hslide, h ) {
+			hslide.setAttribute( 'data-index-h', h );
+			transformElement( hslide, 'translate3d(' + ( h * overviewSlideWidth ) + 'px, 0, 0)' );
+
+			if( hslide.classList.contains( 'stack' ) ) {
+
+				toArray( hslide.querySelectorAll( 'section' ) ).forEach( function( vslide, v ) {
+					vslide.setAttribute( 'data-index-h', h );
+					vslide.setAttribute( 'data-index-v', v );
+
+					transformElement( vslide, 'translate3d(0, ' + ( v * overviewSlideHeight ) + 'px, 0)' );
+				} );
+
+			}
+		} );
+
+		// Layout slide backgrounds
+		toArray( dom.background.childNodes ).forEach( function( hbackground, h ) {
+			transformElement( hbackground, 'translate3d(' + ( h * overviewSlideWidth ) + 'px, 0, 0)' );
+
+			toArray( hbackground.querySelectorAll( '.slide-background' ) ).forEach( function( vbackground, v ) {
+				transformElement( vbackground, 'translate3d(0, ' + ( v * overviewSlideHeight ) + 'px, 0)' );
+			} );
+		} );
+
+	}
+
+	/**
+	 * Moves the overview viewport to the current slides.
+	 * Called each time the current slide changes.
+	 */
+	function updateOverview() {
+
+		var vmin = Math.min( window.innerWidth, window.innerHeight );
+		var scale = Math.max( vmin / 5, 150 ) / vmin;
+
+		transformSlides( {
+			overview: [
+				'scale('+ scale +')',
+				'translateX('+ ( -indexh * overviewSlideWidth ) +'px)',
+				'translateY('+ ( -indexv * overviewSlideHeight ) +'px)'
+			].join( ' ' )
+		} );
+
+	}
+
+	/**
+	 * Exits the slide overview and enters the currently
+	 * active slide.
+	 */
+	function deactivateOverview() {
+
+		// Only proceed if enabled in config
+		if( config.overview ) {
+
+			overview = false;
+
+			dom.wrapper.classList.remove( 'overview' );
+			dom.wrapper.classList.remove( 'overview-animated' );
+
+			// Temporarily add a class so that transitions can do different things
+			// depending on whether they are exiting/entering overview, or just
+			// moving from slide to slide
+			dom.wrapper.classList.add( 'overview-deactivating' );
+
+			setTimeout( function () {
+				dom.wrapper.classList.remove( 'overview-deactivating' );
+			}, 1 );
+
+			// Move the background element back out
+			dom.wrapper.appendChild( dom.background );
+
+			// Clean up changes made to slides
+			toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
+				transformElement( slide, '' );
+
+				slide.removeEventListener( 'click', onOverviewSlideClicked, true );
+			} );
+
+			// Clean up changes made to backgrounds
+			toArray( dom.background.querySelectorAll( '.slide-background' ) ).forEach( function( background ) {
+				transformElement( background, '' );
+			} );
+
+			transformSlides( { overview: '' } );
+
+			slide( indexh, indexv );
+
+			layout();
+
+			cueAutoSlide();
+
+			// Notify observers of the overview hiding
+			dispatchEvent( 'overviewhidden', {
+				'indexh': indexh,
+				'indexv': indexv,
+				'currentSlide': currentSlide
+			} );
+
+		}
+	}
+
+	/**
+	 * Toggles the slide overview mode on and off.
+	 *
+	 * @param {Boolean} [override] Flag which overrides the
+	 * toggle logic and forcibly sets the desired state. True means
+	 * overview is open, false means it's closed.
+	 */
+	function toggleOverview( override ) {
+
+		if( typeof override === 'boolean' ) {
+			override ? activateOverview() : deactivateOverview();
+		}
+		else {
+			isOverview() ? deactivateOverview() : activateOverview();
+		}
+
+	}
+
+	/**
+	 * Checks if the overview is currently active.
+	 *
+	 * @return {Boolean} true if the overview is active,
+	 * false otherwise
+	 */
+	function isOverview() {
+
+		return overview;
+
+	}
+
+	/**
+	 * Checks if the current or specified slide is vertical
+	 * (nested within another slide).
+	 *
+	 * @param {HTMLElement} [slide=currentSlide] The slide to check
+	 * orientation of
+	 * @return {Boolean}
+	 */
+	function isVerticalSlide( slide ) {
+
+		// Prefer slide argument, otherwise use current slide
+		slide = slide ? slide : currentSlide;
+
+		return slide && slide.parentNode && !!slide.parentNode.nodeName.match( /section/i );
+
+	}
+
+	/**
+	 * Handling the fullscreen functionality via the fullscreen API
+	 *
+	 * @see http://fullscreen.spec.whatwg.org/
+	 * @see https://developer.mozilla.org/en-US/docs/DOM/Using_fullscreen_mode
+	 */
+	function enterFullscreen() {
+
+		var element = document.documentElement;
+
+		// Check which implementation is available
+		var requestMethod = element.requestFullscreen ||
+							element.webkitRequestFullscreen ||
+							element.webkitRequestFullScreen ||
+							element.mozRequestFullScreen ||
+							element.msRequestFullscreen;
+
+		if( requestMethod ) {
+			requestMethod.apply( element );
+		}
+
+	}
+
+	/**
+	 * Enters the paused mode which fades everything on screen to
+	 * black.
+	 */
+	function pause() {
+
+		if( config.pause ) {
+			var wasPaused = dom.wrapper.classList.contains( 'paused' );
+
+			cancelAutoSlide();
+			dom.wrapper.classList.add( 'paused' );
+
+			if( wasPaused === false ) {
+				dispatchEvent( 'paused' );
+			}
+		}
+
+	}
+
+	/**
+	 * Exits from the paused mode.
+	 */
+	function resume() {
+
+		var wasPaused = dom.wrapper.classList.contains( 'paused' );
+		dom.wrapper.classList.remove( 'paused' );
+
+		cueAutoSlide();
+
+		if( wasPaused ) {
+			dispatchEvent( 'resumed' );
+		}
+
+	}
+
+	/**
+	 * Toggles the paused mode on and off.
+	 */
+	function togglePause( override ) {
+
+		if( typeof override === 'boolean' ) {
+			override ? pause() : resume();
+		}
+		else {
+			isPaused() ? resume() : pause();
+		}
+
+	}
+
+	/**
+	 * Checks if we are currently in the paused mode.
+	 *
+	 * @return {Boolean}
+	 */
+	function isPaused() {
+
+		return dom.wrapper.classList.contains( 'paused' );
+
+	}
+
+	/**
+	 * Toggles the auto slide mode on and off.
+	 *
+	 * @param {Boolean} [override] Flag which sets the desired state.
+	 * True means autoplay starts, false means it stops.
+	 */
+
+	function toggleAutoSlide( override ) {
+
+		if( typeof override === 'boolean' ) {
+			override ? resumeAutoSlide() : pauseAutoSlide();
+		}
+
+		else {
+			autoSlidePaused ? resumeAutoSlide() : pauseAutoSlide();
+		}
+
+	}
+
+	/**
+	 * Checks if the auto slide mode is currently on.
+	 *
+	 * @return {Boolean}
+	 */
+	function isAutoSliding() {
+
+		return !!( autoSlide && !autoSlidePaused );
+
+	}
+
+	/**
+	 * Steps from the current point in the presentation to the
+	 * slide which matches the specified horizontal and vertical
+	 * indices.
+	 *
+	 * @param {number} [h=indexh] Horizontal index of the target slide
+	 * @param {number} [v=indexv] Vertical index of the target slide
+	 * @param {number} [f] Index of a fragment within the
+	 * target slide to activate
+	 * @param {number} [o] Origin for use in multimaster environments
+	 */
+	function slide( h, v, f, o ) {
+
+		// Remember where we were at before
+		previousSlide = currentSlide;
+
+		// Query all horizontal slides in the deck
+		var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
+
+		// Abort if there are no slides
+		if( horizontalSlides.length === 0 ) return;
+
+		// If no vertical index is specified and the upcoming slide is a
+		// stack, resume at its previous vertical index
+		if( v === undefined && !isOverview() ) {
+			v = getPreviousVerticalIndex( horizontalSlides[ h ] );
+		}
+
+		// If we were on a vertical stack, remember what vertical index
+		// it was on so we can resume at the same position when returning
+		if( previousSlide && previousSlide.parentNode && previousSlide.parentNode.classList.contains( 'stack' ) ) {
+			setPreviousVerticalIndex( previousSlide.parentNode, indexv );
+		}
+
+		// Remember the state before this slide
+		var stateBefore = state.concat();
+
+		// Reset the state array
+		state.length = 0;
+
+		var indexhBefore = indexh || 0,
+			indexvBefore = indexv || 0;
+
+		// Activate and transition to the new slide
+		indexh = updateSlides( HORIZONTAL_SLIDES_SELECTOR, h === undefined ? indexh : h );
+		indexv = updateSlides( VERTICAL_SLIDES_SELECTOR, v === undefined ? indexv : v );
+
+		// Update the visibility of slides now that the indices have changed
+		updateSlidesVisibility();
+
+		layout();
+
+		// Apply the new state
+		stateLoop: for( var i = 0, len = state.length; i < len; i++ ) {
+			// Check if this state existed on the previous slide. If it
+			// did, we will avoid adding it repeatedly
+			for( var j = 0; j < stateBefore.length; j++ ) {
+				if( stateBefore[j] === state[i] ) {
+					stateBefore.splice( j, 1 );
+					continue stateLoop;
+				}
+			}
+
+			document.documentElement.classList.add( state[i] );
+
+			// Dispatch custom event matching the state's name
+			dispatchEvent( state[i] );
+		}
+
+		// Clean up the remains of the previous state
+		while( stateBefore.length ) {
+			document.documentElement.classList.remove( stateBefore.pop() );
+		}
+
+		// Update the overview if it's currently active
+		if( isOverview() ) {
+			updateOverview();
+		}
+
+		// Find the current horizontal slide and any possible vertical slides
+		// within it
+		var currentHorizontalSlide = horizontalSlides[ indexh ],
+			currentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' );
+
+		// Store references to the previous and current slides
+		currentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide;
+
+		// Show fragment, if specified
+		if( typeof f !== 'undefined' ) {
+			navigateFragment( f );
+		}
+
+		// Dispatch an event if the slide changed
+		var slideChanged = ( indexh !== indexhBefore || indexv !== indexvBefore );
+		if( slideChanged ) {
+			dispatchEvent( 'slidechanged', {
+				'indexh': indexh,
+				'indexv': indexv,
+				'previousSlide': previousSlide,
+				'currentSlide': currentSlide,
+				'origin': o
+			} );
+		}
+		else {
+			// Ensure that the previous slide is never the same as the current
+			previousSlide = null;
+		}
+
+		// Solves an edge case where the previous slide maintains the
+		// 'present' class when navigating between adjacent vertical
+		// stacks
+		if( previousSlide ) {
+			previousSlide.classList.remove( 'present' );
+			previousSlide.setAttribute( 'aria-hidden', 'true' );
+
+			// Reset all slides upon navigate to home
+			// Issue: #285
+			if ( dom.wrapper.querySelector( HOME_SLIDE_SELECTOR ).classList.contains( 'present' ) ) {
+				// Launch async task
+				setTimeout( function () {
+					var slides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.stack') ), i;
+					for( i in slides ) {
+						if( slides[i] ) {
+							// Reset stack
+							setPreviousVerticalIndex( slides[i], 0 );
+						}
+					}
+				}, 0 );
+			}
+		}
+
+		// Handle embedded content
+		if( slideChanged || !previousSlide ) {
+			stopEmbeddedContent( previousSlide );
+			startEmbeddedContent( currentSlide );
+		}
+
+		// Announce the current slide contents, for screen readers
+		dom.statusDiv.textContent = getStatusText( currentSlide );
+
+		updateControls();
+		updateProgress();
+		updateBackground();
+		updateParallax();
+		updateSlideNumber();
+		updateNotes();
+
+		// Update the URL hash
+		writeURL();
+
+		cueAutoSlide();
+
+	}
+
+	/**
+	 * Syncs the presentation with the current DOM. Useful
+	 * when new slides or control elements are added or when
+	 * the configuration has changed.
+	 */
+	function sync() {
+
+		// Subscribe to input
+		removeEventListeners();
+		addEventListeners();
+
+		// Force a layout to make sure the current config is accounted for
+		layout();
+
+		// Reflect the current autoSlide value
+		autoSlide = config.autoSlide;
+
+		// Start auto-sliding if it's enabled
+		cueAutoSlide();
+
+		// Re-create the slide backgrounds
+		createBackgrounds();
+
+		// Write the current hash to the URL
+		writeURL();
+
+		sortAllFragments();
+
+		updateControls();
+		updateProgress();
+		updateSlideNumber();
+		updateSlidesVisibility();
+		updateBackground( true );
+		updateNotes();
+
+		formatEmbeddedContent();
+
+		// Start or stop embedded content depending on global config
+		if( config.autoPlayMedia === false ) {
+			stopEmbeddedContent( currentSlide );
+		}
+		else {
+			startEmbeddedContent( currentSlide );
+		}
+
+		if( isOverview() ) {
+			layoutOverview();
+		}
+
+	}
+
+	/**
+	 * Resets all vertical slides so that only the first
+	 * is visible.
+	 */
+	function resetVerticalSlides() {
+
+		var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
+		horizontalSlides.forEach( function( horizontalSlide ) {
+
+			var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) );
+			verticalSlides.forEach( function( verticalSlide, y ) {
+
+				if( y > 0 ) {
+					verticalSlide.classList.remove( 'present' );
+					verticalSlide.classList.remove( 'past' );
+					verticalSlide.classList.add( 'future' );
+					verticalSlide.setAttribute( 'aria-hidden', 'true' );
+				}
+
+			} );
+
+		} );
+
+	}
+
+	/**
+	 * Sorts and formats all of fragments in the
+	 * presentation.
+	 */
+	function sortAllFragments() {
+
+		var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
+		horizontalSlides.forEach( function( horizontalSlide ) {
+
+			var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) );
+			verticalSlides.forEach( function( verticalSlide, y ) {
+
+				sortFragments( verticalSlide.querySelectorAll( '.fragment' ) );
+
+			} );
+
+			if( verticalSlides.length === 0 ) sortFragments( horizontalSlide.querySelectorAll( '.fragment' ) );
+
+		} );
+
+	}
+
+	/**
+	 * Randomly shuffles all slides in the deck.
+	 */
+	function shuffle() {
+
+		var slides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
+
+		slides.forEach( function( slide ) {
+
+			// Insert this slide next to another random slide. This may
+			// cause the slide to insert before itself but that's fine.
+			dom.slides.insertBefore( slide, slides[ Math.floor( Math.random() * slides.length ) ] );
+
+		} );
+
+	}
+
+	/**
+	 * Updates one dimension of slides by showing the slide
+	 * with the specified index.
+	 *
+	 * @param {string} selector A CSS selector that will fetch
+	 * the group of slides we are working with
+	 * @param {number} index The index of the slide that should be
+	 * shown
+	 *
+	 * @return {number} The index of the slide that is now shown,
+	 * might differ from the passed in index if it was out of
+	 * bounds.
+	 */
+	function updateSlides( selector, index ) {
+
+		// Select all slides and convert the NodeList result to
+		// an array
+		var slides = toArray( dom.wrapper.querySelectorAll( selector ) ),
+			slidesLength = slides.length;
+
+		var printMode = isPrintingPDF();
+
+		if( slidesLength ) {
+
+			// Should the index loop?
+			if( config.loop ) {
+				index %= slidesLength;
+
+				if( index < 0 ) {
+					index = slidesLength + index;
+				}
+			}
+
+			// Enforce max and minimum index bounds
+			index = Math.max( Math.min( index, slidesLength - 1 ), 0 );
+
+			for( var i = 0; i < slidesLength; i++ ) {
+				var element = slides[i];
+
+				var reverse = config.rtl && !isVerticalSlide( element );
+
+				element.classList.remove( 'past' );
+				element.classList.remove( 'present' );
+				element.classList.remove( 'future' );
+
+				// http://www.w3.org/html/wg/drafts/html/master/editing.html#the-hidden-attribute
+				element.setAttribute( 'hidden', '' );
+				element.setAttribute( 'aria-hidden', 'true' );
+
+				// If this element contains vertical slides
+				if( element.querySelector( 'section' ) ) {
+					element.classList.add( 'stack' );
+				}
+
+				// If we're printing static slides, all slides are "present"
+				if( printMode ) {
+					element.classList.add( 'present' );
+					continue;
+				}
+
+				if( i < index ) {
+					// Any element previous to index is given the 'past' class
+					element.classList.add( reverse ? 'future' : 'past' );
+
+					if( config.fragments ) {
+						var pastFragments = toArray( element.querySelectorAll( '.fragment' ) );
+
+						// Show all fragments on prior slides
+						while( pastFragments.length ) {
+							var pastFragment = pastFragments.pop();
+							pastFragment.classList.add( 'visible' );
+							pastFragment.classList.remove( 'current-fragment' );
+						}
+					}
+				}
+				else if( i > index ) {
+					// Any element subsequent to index is given the 'future' class
+					element.classList.add( reverse ? 'past' : 'future' );
+
+					if( config.fragments ) {
+						var futureFragments = toArray( element.querySelectorAll( '.fragment.visible' ) );
+
+						// No fragments in future slides should be visible ahead of time
+						while( futureFragments.length ) {
+							var futureFragment = futureFragments.pop();
+							futureFragment.classList.remove( 'visible' );
+							futureFragment.classList.remove( 'current-fragment' );
+						}
+					}
+				}
+			}
+
+			// Mark the current slide as present
+			slides[index].classList.add( 'present' );
+			slides[index].removeAttribute( 'hidden' );
+			slides[index].removeAttribute( 'aria-hidden' );
+
+			// If this slide has a state associated with it, add it
+			// onto the current state of the deck
+			var slideState = slides[index].getAttribute( 'data-state' );
+			if( slideState ) {
+				state = state.concat( slideState.split( ' ' ) );
+			}
+
+		}
+		else {
+			// Since there are no slides we can't be anywhere beyond the
+			// zeroth index
+			index = 0;
+		}
+
+		return index;
+
+	}
+
+	/**
+	 * Optimization method; hide all slides that are far away
+	 * from the present slide.
+	 */
+	function updateSlidesVisibility() {
+
+		// Select all slides and convert the NodeList result to
+		// an array
+		var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ),
+			horizontalSlidesLength = horizontalSlides.length,
+			distanceX,
+			distanceY;
+
+		if( horizontalSlidesLength && typeof indexh !== 'undefined' ) {
+
+			// The number of steps away from the present slide that will
+			// be visible
+			var viewDistance = isOverview() ? 10 : config.viewDistance;
+
+			// Limit view distance on weaker devices
+			if( isMobileDevice ) {
+				viewDistance = isOverview() ? 6 : 2;
+			}
+
+			// All slides need to be visible when exporting to PDF
+			if( isPrintingPDF() ) {
+				viewDistance = Number.MAX_VALUE;
+			}
+
+			for( var x = 0; x < horizontalSlidesLength; x++ ) {
+				var horizontalSlide = horizontalSlides[x];
+
+				var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ),
+					verticalSlidesLength = verticalSlides.length;
+
+				// Determine how far away this slide is from the present
+				distanceX = Math.abs( ( indexh || 0 ) - x ) || 0;
+
+				// If the presentation is looped, distance should measure
+				// 1 between the first and last slides
+				if( config.loop ) {
+					distanceX = Math.abs( ( ( indexh || 0 ) - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;
+				}
+
+				// Show the horizontal slide if it's within the view distance
+				if( distanceX < viewDistance ) {
+					showSlide( horizontalSlide );
+				}
+				else {
+					hideSlide( horizontalSlide );
+				}
+
+				if( verticalSlidesLength ) {
+
+					var oy = getPreviousVerticalIndex( horizontalSlide );
+
+					for( var y = 0; y < verticalSlidesLength; y++ ) {
+						var verticalSlide = verticalSlides[y];
+
+						distanceY = x === ( indexh || 0 ) ? Math.abs( ( indexv || 0 ) - y ) : Math.abs( y - oy );
+
+						if( distanceX + distanceY < viewDistance ) {
+							showSlide( verticalSlide );
+						}
+						else {
+							hideSlide( verticalSlide );
+						}
+					}
+
+				}
+			}
+
+		}
+
+	}
+
+	/**
+	 * Pick up notes from the current slide and display them
+	 * to the viewer.
+	 *
+	 * @see {@link config.showNotes}
+	 */
+	function updateNotes() {
+
+		if( config.showNotes && dom.speakerNotes && currentSlide && !isPrintingPDF() ) {
+
+			dom.speakerNotes.innerHTML = getSlideNotes() || '';
+
+		}
+
+	}
+
+	/**
+	 * Updates the progress bar to reflect the current slide.
+	 */
+	function updateProgress() {
+
+		// Update progress if enabled
+		if( config.progress && dom.progressbar ) {
+
+			dom.progressbar.style.width = getProgress() * dom.wrapper.offsetWidth + 'px';
+
+		}
+
+	}
+
+	/**
+	 * Updates the slide number div to reflect the current slide.
+	 *
+	 * The following slide number formats are available:
+	 *  "h.v":	horizontal . vertical slide number (default)
+	 *  "h/v":	horizontal / vertical slide number
+	 *    "c":	flattened slide number
+	 *  "c/t":	flattened slide number / total slides
+	 */
+	function updateSlideNumber() {
+
+		// Update slide number if enabled
+		if( config.slideNumber && dom.slideNumber ) {
+
+			var value = [];
+			var format = 'h.v';
+
+			// Check if a custom number format is available
+			if( typeof config.slideNumber === 'string' ) {
+				format = config.slideNumber;
+			}
+
+			switch( format ) {
+				case 'c':
+					value.push( getSlidePastCount() + 1 );
+					break;
+				case 'c/t':
+					value.push( getSlidePastCount() + 1, '/', getTotalSlides() );
+					break;
+				case 'h/v':
+					value.push( indexh + 1 );
+					if( isVerticalSlide() ) value.push( '/', indexv + 1 );
+					break;
+				default:
+					value.push( indexh + 1 );
+					if( isVerticalSlide() ) value.push( '.', indexv + 1 );
+			}
+
+			dom.slideNumber.innerHTML = formatSlideNumber( value[0], value[1], value[2] );
+		}
+
+	}
+
+	/**
+	 * Applies HTML formatting to a slide number before it's
+	 * written to the DOM.
+	 *
+	 * @param {number} a Current slide
+	 * @param {string} delimiter Character to separate slide numbers
+	 * @param {(number|*)} b Total slides
+	 * @return {string} HTML string fragment
+	 */
+	function formatSlideNumber( a, delimiter, b ) {
+
+		if( typeof b === 'number' && !isNaN( b ) ) {
+			return  '<span class="slide-number-a">'+ a +'</span>' +
+					'<span class="slide-number-delimiter">'+ delimiter +'</span>' +
+					'<span class="slide-number-b">'+ b +'</span>';
+		}
+		else {
+			return '<span class="slide-number-a">'+ a +'</span>';
+		}
+
+	}
+
+	/**
+	 * Updates the state of all control/navigation arrows.
+	 */
+	function updateControls() {
+
+		var routes = availableRoutes();
+		var fragments = availableFragments();
+
+		// Remove the 'enabled' class from all directions
+		dom.controlsLeft.concat( dom.controlsRight )
+						.concat( dom.controlsUp )
+						.concat( dom.controlsDown )
+						.concat( dom.controlsPrev )
+						.concat( dom.controlsNext ).forEach( function( node ) {
+			node.classList.remove( 'enabled' );
+			node.classList.remove( 'fragmented' );
+
+			// Set 'disabled' attribute on all directions
+			node.setAttribute( 'disabled', 'disabled' );
+		} );
+
+		// Add the 'enabled' class to the available routes; remove 'disabled' attribute to enable buttons
+		if( routes.left ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+		if( routes.right ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+		if( routes.up ) dom.controlsUp.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+		if( routes.down ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+
+		// Prev/next buttons
+		if( routes.left || routes.up ) dom.controlsPrev.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+		if( routes.right || routes.down ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+
+		// Highlight fragment directions
+		if( currentSlide ) {
+
+			// Always apply fragment decorator to prev/next buttons
+			if( fragments.prev ) dom.controlsPrev.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+			if( fragments.next ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+
+			// Apply fragment decorators to directional buttons based on
+			// what slide axis they are in
+			if( isVerticalSlide( currentSlide ) ) {
+				if( fragments.prev ) dom.controlsUp.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+				if( fragments.next ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+			}
+			else {
+				if( fragments.prev ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+				if( fragments.next ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+			}
+
+		}
+
+	}
+
+	/**
+	 * Updates the background elements to reflect the current
+	 * slide.
+	 *
+	 * @param {boolean} includeAll If true, the backgrounds of
+	 * all vertical slides (not just the present) will be updated.
+	 */
+	function updateBackground( includeAll ) {
+
+		var currentBackground = null;
+
+		// Reverse past/future classes when in RTL mode
+		var horizontalPast = config.rtl ? 'future' : 'past',
+			horizontalFuture = config.rtl ? 'past' : 'future';
+
+		// Update the classes of all backgrounds to match the
+		// states of their slides (past/present/future)
+		toArray( dom.background.childNodes ).forEach( function( backgroundh, h ) {
+
+			backgroundh.classList.remove( 'past' );
+			backgroundh.classList.remove( 'present' );
+			backgroundh.classList.remove( 'future' );
+
+			if( h < indexh ) {
+				backgroundh.classList.add( horizontalPast );
+			}
+			else if ( h > indexh ) {
+				backgroundh.classList.add( horizontalFuture );
+			}
+			else {
+				backgroundh.classList.add( 'present' );
+
+				// Store a reference to the current background element
+				currentBackground = backgroundh;
+			}
+
+			if( includeAll || h === indexh ) {
+				toArray( backgroundh.querySelectorAll( '.slide-background' ) ).forEach( function( backgroundv, v ) {
+
+					backgroundv.classList.remove( 'past' );
+					backgroundv.classList.remove( 'present' );
+					backgroundv.classList.remove( 'future' );
+
+					if( v < indexv ) {
+						backgroundv.classList.add( 'past' );
+					}
+					else if ( v > indexv ) {
+						backgroundv.classList.add( 'future' );
+					}
+					else {
+						backgroundv.classList.add( 'present' );
+
+						// Only if this is the present horizontal and vertical slide
+						if( h === indexh ) currentBackground = backgroundv;
+					}
+
+				} );
+			}
+
+		} );
+
+		// Stop content inside of previous backgrounds
+		if( previousBackground ) {
+
+			stopEmbeddedContent( previousBackground );
+
+		}
+
+		// Start content in the current background
+		if( currentBackground ) {
+
+			startEmbeddedContent( currentBackground );
+
+			var backgroundImageURL = currentBackground.style.backgroundImage || '';
+
+			// Restart GIFs (doesn't work in Firefox)
+			if( /\.gif/i.test( backgroundImageURL ) ) {
+				currentBackground.style.backgroundImage = '';
+				window.getComputedStyle( currentBackground ).opacity;
+				currentBackground.style.backgroundImage = backgroundImageURL;
+			}
+
+			// Don't transition between identical backgrounds. This
+			// prevents unwanted flicker.
+			var previousBackgroundHash = previousBackground ? previousBackground.getAttribute( 'data-background-hash' ) : null;
+			var currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );
+			if( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== previousBackground ) {
+				dom.background.classList.add( 'no-transition' );
+			}
+
+			previousBackground = currentBackground;
+
+		}
+
+		// If there's a background brightness flag for this slide,
+		// bubble it to the .reveal container
+		if( currentSlide ) {
+			[ 'has-light-background', 'has-dark-background' ].forEach( function( classToBubble ) {
+				if( currentSlide.classList.contains( classToBubble ) ) {
+					dom.wrapper.classList.add( classToBubble );
+				}
+				else {
+					dom.wrapper.classList.remove( classToBubble );
+				}
+			} );
+		}
+
+		// Allow the first background to apply without transition
+		setTimeout( function() {
+			dom.background.classList.remove( 'no-transition' );
+		}, 1 );
+
+	}
+
+	/**
+	 * Updates the position of the parallax background based
+	 * on the current slide index.
+	 */
+	function updateParallax() {
+
+		if( config.parallaxBackgroundImage ) {
+
+			var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ),
+				verticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR );
+
+			var backgroundSize = dom.background.style.backgroundSize.split( ' ' ),
+				backgroundWidth, backgroundHeight;
+
+			if( backgroundSize.length === 1 ) {
+				backgroundWidth = backgroundHeight = parseInt( backgroundSize[0], 10 );
+			}
+			else {
+				backgroundWidth = parseInt( backgroundSize[0], 10 );
+				backgroundHeight = parseInt( backgroundSize[1], 10 );
+			}
+
+			var slideWidth = dom.background.offsetWidth,
+				horizontalSlideCount = horizontalSlides.length,
+				horizontalOffsetMultiplier,
+				horizontalOffset;
+
+			if( typeof config.parallaxBackgroundHorizontal === 'number' ) {
+				horizontalOffsetMultiplier = config.parallaxBackgroundHorizontal;
+			}
+			else {
+				horizontalOffsetMultiplier = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0;
+			}
+
+			horizontalOffset = horizontalOffsetMultiplier * indexh * -1;
+
+			var slideHeight = dom.background.offsetHeight,
+				verticalSlideCount = verticalSlides.length,
+				verticalOffsetMultiplier,
+				verticalOffset;
+
+			if( typeof config.parallaxBackgroundVertical === 'number' ) {
+				verticalOffsetMultiplier = config.parallaxBackgroundVertical;
+			}
+			else {
+				verticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 );
+			}
+
+			verticalOffset = verticalSlideCount > 0 ?  verticalOffsetMultiplier * indexv : 0;
+
+			dom.background.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';
+
+		}
+
+	}
+
+	/**
+	 * Called when the given slide is within the configured view
+	 * distance. Shows the slide element and loads any content
+	 * that is set to load lazily (data-src).
+	 *
+	 * @param {HTMLElement} slide Slide to show
+	 */
+	/**
+	 * Called when the given slide is within the configured view
+	 * distance. Shows the slide element and loads any content
+	 * that is set to load lazily (data-src).
+	 *
+	 * @param {HTMLElement} slide Slide to show
+	 */
+	function showSlide( slide ) {
+
+		// Show the slide element
+		slide.style.display = config.display;
+
+		// Media elements with data-src attributes
+		toArray( slide.querySelectorAll( 'img[data-src], video[data-src], audio[data-src]' ) ).forEach( function( element ) {
+			element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
+			element.removeAttribute( 'data-src' );
+		} );
+
+		// Media elements with <source> children
+		toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( media ) {
+			var sources = 0;
+
+			toArray( media.querySelectorAll( 'source[data-src]' ) ).forEach( function( source ) {
+				source.setAttribute( 'src', source.getAttribute( 'data-src' ) );
+				source.removeAttribute( 'data-src' );
+				sources += 1;
+			} );
+
+			// If we rewrote sources for this video/audio element, we need
+			// to manually tell it to load from its new origin
+			if( sources > 0 ) {
+				media.load();
+			}
+		} );
+
+
+		// Show the corresponding background element
+		var indices = getIndices( slide );
+		var background = getSlideBackground( indices.h, indices.v );
+		if( background ) {
+			background.style.display = 'block';
+
+			// If the background contains media, load it
+			if( background.hasAttribute( 'data-loaded' ) === false ) {
+				background.setAttribute( 'data-loaded', 'true' );
+
+				var backgroundImage = slide.getAttribute( 'data-background-image' ),
+					backgroundVideo = slide.getAttribute( 'data-background-video' ),
+					backgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ),
+					backgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' ),
+					backgroundIframe = slide.getAttribute( 'data-background-iframe' );
+
+				// Images
+				if( backgroundImage ) {
+					background.style.backgroundImage = 'url('+ backgroundImage +')';
+				}
+				// Videos
+				else if ( backgroundVideo && !isSpeakerNotes() ) {
+					var video = document.createElement( 'video' );
+
+					if( backgroundVideoLoop ) {
+						video.setAttribute( 'loop', '' );
+					}
+
+					if( backgroundVideoMuted ) {
+						video.muted = true;
+					}
+
+					// Inline video playback works (at least in Mobile Safari) as
+					// long as the video is muted and the `playsinline` attribute is
+					// present
+					if( isMobileDevice ) {
+						video.muted = true;
+						video.autoplay = true;
+						video.setAttribute( 'playsinline', '' );
+					}
+
+					// Support comma separated lists of video sources
+					backgroundVideo.split( ',' ).forEach( function( source ) {
+						video.innerHTML += '<source src="'+ source +'">';
+					} );
+
+					background.appendChild( video );
+				}
+				// Iframes
+				else if( backgroundIframe ) {
+					var iframe = document.createElement( 'iframe' );
+					iframe.setAttribute( 'allowfullscreen', '' );
+					iframe.setAttribute( 'mozallowfullscreen', '' );
+					iframe.setAttribute( 'webkitallowfullscreen', '' );
+
+					// Only load autoplaying content when the slide is shown to
+					// avoid having it play in the background
+					if( /autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) {
+						iframe.setAttribute( 'data-src', backgroundIframe );
+					}
+					else {
+						iframe.setAttribute( 'src', backgroundIframe );
+					}
+
+					iframe.style.width  = '100%';
+					iframe.style.height = '100%';
+					iframe.style.maxHeight = '100%';
+					iframe.style.maxWidth = '100%';
+
+					background.appendChild( iframe );
+				}
+			}
+
+		}
+
+	}
+
+	/**
+	 * Called when the given slide is moved outside of the
+	 * configured view distance.
+	 *
+	 * @param {HTMLElement} slide
+	 */
+	function hideSlide( slide ) {
+
+		// Hide the slide element
+		slide.style.display = 'none';
+
+		// Hide the corresponding background element
+		var indices = getIndices( slide );
+		var background = getSlideBackground( indices.h, indices.v );
+		if( background ) {
+			background.style.display = 'none';
+		}
+
+	}
+
+	/**
+	 * Determine what available routes there are for navigation.
+	 *
+	 * @return {{left: boolean, right: boolean, up: boolean, down: boolean}}
+	 */
+	function availableRoutes() {
+
+		var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ),
+			verticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR );
+
+		var routes = {
+			left: indexh > 0 || config.loop,
+			right: indexh < horizontalSlides.length - 1 || config.loop,
+			up: indexv > 0,
+			down: indexv < verticalSlides.length - 1
+		};
+
+		// reverse horizontal controls for rtl
+		if( config.rtl ) {
+			var left = routes.left;
+			routes.left = routes.right;
+			routes.right = left;
+		}
+
+		return routes;
+
+	}
+
+	/**
+	 * Returns an object describing the available fragment
+	 * directions.
+	 *
+	 * @return {{prev: boolean, next: boolean}}
+	 */
+	function availableFragments() {
+
+		if( currentSlide && config.fragments ) {
+			var fragments = currentSlide.querySelectorAll( '.fragment' );
+			var hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.visible)' );
+
+			return {
+				prev: fragments.length - hiddenFragments.length > 0,
+				next: !!hiddenFragments.length
+			};
+		}
+		else {
+			return { prev: false, next: false };
+		}
+
+	}
+
+	/**
+	 * Enforces origin-specific format rules for embedded media.
+	 */
+	function formatEmbeddedContent() {
+
+		var _appendParamToIframeSource = function( sourceAttribute, sourceURL, param ) {
+			toArray( dom.slides.querySelectorAll( 'iframe['+ sourceAttribute +'*="'+ sourceURL +'"]' ) ).forEach( function( el ) {
+				var src = el.getAttribute( sourceAttribute );
+				if( src && src.indexOf( param ) === -1 ) {
+					el.setAttribute( sourceAttribute, src + ( !/\?/.test( src ) ? '?' : '&' ) + param );
+				}
+			});
+		};
+
+		// YouTube frames must include "?enablejsapi=1"
+		_appendParamToIframeSource( 'src', 'youtube.com/embed/', 'enablejsapi=1' );
+		_appendParamToIframeSource( 'data-src', 'youtube.com/embed/', 'enablejsapi=1' );
+
+		// Vimeo frames must include "?api=1"
+		_appendParamToIframeSource( 'src', 'player.vimeo.com/', 'api=1' );
+		_appendParamToIframeSource( 'data-src', 'player.vimeo.com/', 'api=1' );
+
+	}
+
+	/**
+	 * Start playback of any embedded content inside of
+	 * the given element.
+	 *
+	 * @param {HTMLElement} element
+	 */
+	function startEmbeddedContent( element ) {
+
+		if( element && !isSpeakerNotes() ) {
+
+			// Restart GIFs
+			toArray( element.querySelectorAll( 'img[src$=".gif"]' ) ).forEach( function( el ) {
+				// Setting the same unchanged source like this was confirmed
+				// to work in Chrome, FF & Safari
+				el.setAttribute( 'src', el.getAttribute( 'src' ) );
+			} );
+
+			// HTML5 media elements
+			toArray( element.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
+				if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
+					return;
+				}
+
+				// Prefer an explicit global autoplay setting
+				var autoplay = config.autoPlayMedia;
+
+				// If no global setting is available, fall back on the element's
+				// own autoplay setting
+				if( typeof autoplay !== 'boolean' ) {
+					autoplay = el.hasAttribute( 'data-autoplay' ) || !!closestParent( el, '.slide-background' );
+				}
+
+				if( autoplay && typeof el.play === 'function' ) {
+
+					if( el.readyState > 1 ) {
+						startEmbeddedMedia( { target: el } );
+					}
+					else {
+						el.removeEventListener( 'loadeddata', startEmbeddedMedia ); // remove first to avoid dupes
+						el.addEventListener( 'loadeddata', startEmbeddedMedia );
+					}
+
+				}
+			} );
+
+			// Normal iframes
+			toArray( element.querySelectorAll( 'iframe[src]' ) ).forEach( function( el ) {
+				if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
+					return;
+				}
+
+				startEmbeddedIframe( { target: el } );
+			} );
+
+			// Lazy loading iframes
+			toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) {
+				if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
+					return;
+				}
+
+				if( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {
+					el.removeEventListener( 'load', startEmbeddedIframe ); // remove first to avoid dupes
+					el.addEventListener( 'load', startEmbeddedIframe );
+					el.setAttribute( 'src', el.getAttribute( 'data-src' ) );
+				}
+			} );
+
+		}
+
+	}
+
+	/**
+	 * Starts playing an embedded video/audio element after
+	 * it has finished loading.
+	 *
+	 * @param {object} event
+	 */
+	function startEmbeddedMedia( event ) {
+
+		var isAttachedToDOM = !!closestParent( event.target, 'html' ),
+			isVisible  		= !!closestParent( event.target, '.present' );
+
+		if( isAttachedToDOM && isVisible ) {
+			event.target.currentTime = 0;
+			event.target.play();
+		}
+
+		event.target.removeEventListener( 'loadeddata', startEmbeddedMedia );
+
+	}
+
+	/**
+	 * "Starts" the content of an embedded iframe using the
+	 * postMessage API.
+	 *
+	 * @param {object} event
+	 */
+	function startEmbeddedIframe( event ) {
+
+		var iframe = event.target;
+
+		if( iframe && iframe.contentWindow ) {
+
+			var isAttachedToDOM = !!closestParent( event.target, 'html' ),
+				isVisible  		= !!closestParent( event.target, '.present' );
+
+			if( isAttachedToDOM && isVisible ) {
+
+				// Prefer an explicit global autoplay setting
+				var autoplay = config.autoPlayMedia;
+
+				// If no global setting is available, fall back on the element's
+				// own autoplay setting
+				if( typeof autoplay !== 'boolean' ) {
+					autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closestParent( iframe, '.slide-background' );
+				}
+
+				// YouTube postMessage API
+				if( /youtube\.com\/embed\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
+					iframe.contentWindow.postMessage( '{"event":"command","func":"playVideo","args":""}', '*' );
+				}
+				// Vimeo postMessage API
+				else if( /player\.vimeo\.com\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
+					iframe.contentWindow.postMessage( '{"method":"play"}', '*' );
+				}
+				// Generic postMessage API
+				else {
+					iframe.contentWindow.postMessage( 'slide:start', '*' );
+				}
+
+			}
+
+		}
+
+	}
+
+	/**
+	 * Stop playback of any embedded content inside of
+	 * the targeted slide.
+	 *
+	 * @param {HTMLElement} element
+	 */
+	function stopEmbeddedContent( element ) {
+
+		if( element && element.parentNode ) {
+			// HTML5 media elements
+			toArray( element.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
+				if( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {
+					el.setAttribute('data-paused-by-reveal', '');
+					el.pause();
+				}
+			} );
+
+			// Generic postMessage API for non-lazy loaded iframes
+			toArray( element.querySelectorAll( 'iframe' ) ).forEach( function( el ) {
+				if( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );
+				el.removeEventListener( 'load', startEmbeddedIframe );
+			});
+
+			// YouTube postMessage API
+			toArray( element.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) {
+				if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
+					el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' );
+				}
+			});
+
+			// Vimeo postMessage API
+			toArray( element.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( function( el ) {
+				if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
+					el.contentWindow.postMessage( '{"method":"pause"}', '*' );
+				}
+			});
+
+			// Lazy loading iframes
+			toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) {
+				// Only removing the src doesn't actually unload the frame
+				// in all browsers (Firefox) so we set it to blank first
+				el.setAttribute( 'src', 'about:blank' );
+				el.removeAttribute( 'src' );
+			} );
+		}
+
+	}
+
+	/**
+	 * Returns the number of past slides. This can be used as a global
+	 * flattened index for slides.
+	 *
+	 * @return {number} Past slide count
+	 */
+	function getSlidePastCount() {
+
+		var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
+
+		// The number of past slides
+		var pastCount = 0;
+
+		// Step through all slides and count the past ones
+		mainLoop: for( var i = 0; i < horizontalSlides.length; i++ ) {
+
+			var horizontalSlide = horizontalSlides[i];
+			var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) );
+
+			for( var j = 0; j < verticalSlides.length; j++ ) {
+
+				// Stop as soon as we arrive at the present
+				if( verticalSlides[j].classList.contains( 'present' ) ) {
+					break mainLoop;
+				}
+
+				pastCount++;
+
+			}
+
+			// Stop as soon as we arrive at the present
+			if( horizontalSlide.classList.contains( 'present' ) ) {
+				break;
+			}
+
+			// Don't count the wrapping section for vertical slides
+			if( horizontalSlide.classList.contains( 'stack' ) === false ) {
+				pastCount++;
+			}
+
+		}
+
+		return pastCount;
+
+	}
+
+	/**
+	 * Returns a value ranging from 0-1 that represents
+	 * how far into the presentation we have navigated.
+	 *
+	 * @return {number}
+	 */
+	function getProgress() {
+
+		// The number of past and total slides
+		var totalCount = getTotalSlides();
+		var pastCount = getSlidePastCount();
+
+		if( currentSlide ) {
+
+			var allFragments = currentSlide.querySelectorAll( '.fragment' );
+
+			// If there are fragments in the current slide those should be
+			// accounted for in the progress.
+			if( allFragments.length > 0 ) {
+				var visibleFragments = currentSlide.querySelectorAll( '.fragment.visible' );
+
+				// This value represents how big a portion of the slide progress
+				// that is made up by its fragments (0-1)
+				var fragmentWeight = 0.9;
+
+				// Add fragment progress to the past slide count
+				pastCount += ( visibleFragments.length / allFragments.length ) * fragmentWeight;
+			}
+
+		}
+
+		return pastCount / ( totalCount - 1 );
+
+	}
+
+	/**
+	 * Checks if this presentation is running inside of the
+	 * speaker notes window.
+	 *
+	 * @return {boolean}
+	 */
+	function isSpeakerNotes() {
+
+		return !!window.location.search.match( /receiver/gi );
+
+	}
+
+	/**
+	 * Reads the current URL (hash) and navigates accordingly.
+	 */
+	function readURL() {
+
+		var hash = window.location.hash;
+
+		// Attempt to parse the hash as either an index or name
+		var bits = hash.slice( 2 ).split( '/' ),
+			name = hash.replace( /#|\//gi, '' );
+
+		// If the first bit is invalid and there is a name we can
+		// assume that this is a named link
+		if( isNaN( parseInt( bits[0], 10 ) ) && name.length ) {
+			var element;
+
+			// Ensure the named link is a valid HTML ID attribute
+			if( /^[a-zA-Z][\w:.-]*$/.test( name ) ) {
+				// Find the slide with the specified ID
+				element = document.getElementById( name );
+			}
+
+			if( element ) {
+				// Find the position of the named slide and navigate to it
+				var indices = Reveal.getIndices( element );
+				slide( indices.h, indices.v );
+			}
+			// If the slide doesn't exist, navigate to the current slide
+			else {
+				slide( indexh || 0, indexv || 0 );
+			}
+		}
+		else {
+			// Read the index components of the hash
+			var h = parseInt( bits[0], 10 ) || 0,
+				v = parseInt( bits[1], 10 ) || 0;
+
+			if( h !== indexh || v !== indexv ) {
+				slide( h, v );
+			}
+		}
+
+	}
+
+	/**
+	 * Updates the page URL (hash) to reflect the current
+	 * state.
+	 *
+	 * @param {number} delay The time in ms to wait before
+	 * writing the hash
+	 */
+	function writeURL( delay ) {
+
+		if( config.history ) {
+
+			// Make sure there's never more than one timeout running
+			clearTimeout( writeURLTimeout );
+
+			// If a delay is specified, timeout this call
+			if( typeof delay === 'number' ) {
+				writeURLTimeout = setTimeout( writeURL, delay );
+			}
+			else if( currentSlide ) {
+				var url = '/';
+
+				// Attempt to create a named link based on the slide's ID
+				var id = currentSlide.getAttribute( 'id' );
+				if( id ) {
+					id = id.replace( /[^a-zA-Z0-9\-\_\:\.]/g, '' );
+				}
+
+				// If the current slide has an ID, use that as a named link
+				if( typeof id === 'string' && id.length ) {
+					url = '/' + id;
+				}
+				// Otherwise use the /h/v index
+				else {
+					if( indexh > 0 || indexv > 0 ) url += indexh;
+					if( indexv > 0 ) url += '/' + indexv;
+				}
+
+				window.location.hash = url;
+			}
+		}
+
+	}
+	/**
+	 * Retrieves the h/v location and fragment of the current,
+	 * or specified, slide.
+	 *
+	 * @param {HTMLElement} [slide] If specified, the returned
+	 * index will be for this slide rather than the currently
+	 * active one
+	 *
+	 * @return {{h: number, v: number, f: number}}
+	 */
+	function getIndices( slide ) {
+
+		// By default, return the current indices
+		var h = indexh,
+			v = indexv,
+			f;
+
+		// If a slide is specified, return the indices of that slide
+		if( slide ) {
+			var isVertical = isVerticalSlide( slide );
+			var slideh = isVertical ? slide.parentNode : slide;
+
+			// Select all horizontal slides
+			var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
+
+			// Now that we know which the horizontal slide is, get its index
+			h = Math.max( horizontalSlides.indexOf( slideh ), 0 );
+
+			// Assume we're not vertical
+			v = undefined;
+
+			// If this is a vertical slide, grab the vertical index
+			if( isVertical ) {
+				v = Math.max( toArray( slide.parentNode.querySelectorAll( 'section' ) ).indexOf( slide ), 0 );
+			}
+		}
+
+		if( !slide && currentSlide ) {
+			var hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0;
+			if( hasFragments ) {
+				var currentFragment = currentSlide.querySelector( '.current-fragment' );
+				if( currentFragment && currentFragment.hasAttribute( 'data-fragment-index' ) ) {
+					f = parseInt( currentFragment.getAttribute( 'data-fragment-index' ), 10 );
+				}
+				else {
+					f = currentSlide.querySelectorAll( '.fragment.visible' ).length - 1;
+				}
+			}
+		}
+
+		return { h: h, v: v, f: f };
+
+	}
+
+	/**
+	 * Retrieves all slides in this presentation.
+	 */
+	function getSlides() {
+
+		return toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ':not(.stack)' ));
+
+	}
+
+	/**
+	 * Retrieves the total number of slides in this presentation.
+	 *
+	 * @return {number}
+	 */
+	function getTotalSlides() {
+
+		return getSlides().length;
+
+	}
+
+	/**
+	 * Returns the slide element matching the specified index.
+	 *
+	 * @return {HTMLElement}
+	 */
+	function getSlide( x, y ) {
+
+		var horizontalSlide = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR )[ x ];
+		var verticalSlides = horizontalSlide && horizontalSlide.querySelectorAll( 'section' );
+
+		if( verticalSlides && verticalSlides.length && typeof y === 'number' ) {
+			return verticalSlides ? verticalSlides[ y ] : undefined;
+		}
+
+		return horizontalSlide;
+
+	}
+
+	/**
+	 * Returns the background element for the given slide.
+	 * All slides, even the ones with no background properties
+	 * defined, have a background element so as long as the
+	 * index is valid an element will be returned.
+	 *
+	 * @param {number} x Horizontal background index
+	 * @param {number} y Vertical background index
+	 * @return {(HTMLElement[]|*)}
+	 */
+	function getSlideBackground( x, y ) {
+
+		// When printing to PDF the slide backgrounds are nested
+		// inside of the slides
+		if( isPrintingPDF() ) {
+			var slide = getSlide( x, y );
+			if( slide ) {
+				return slide.slideBackgroundElement;
+			}
+
+			return undefined;
+		}
+
+		var horizontalBackground = dom.wrapper.querySelectorAll( '.backgrounds>.slide-background' )[ x ];
+		var verticalBackgrounds = horizontalBackground && horizontalBackground.querySelectorAll( '.slide-background' );
+
+		if( verticalBackgrounds && verticalBackgrounds.length && typeof y === 'number' ) {
+			return verticalBackgrounds ? verticalBackgrounds[ y ] : undefined;
+		}
+
+		return horizontalBackground;
+
+	}
+
+	/**
+	 * Retrieves the speaker notes from a slide. Notes can be
+	 * defined in two ways:
+	 * 1. As a data-notes attribute on the slide <section>
+	 * 2. As an <aside class="notes"> inside of the slide
+	 *
+	 * @param {HTMLElement} [slide=currentSlide]
+	 * @return {(string|null)}
+	 */
+	function getSlideNotes( slide ) {
+
+		// Default to the current slide
+		slide = slide || currentSlide;
+
+		// Notes can be specified via the data-notes attribute...
+		if( slide.hasAttribute( 'data-notes' ) ) {
+			return slide.getAttribute( 'data-notes' );
+		}
+
+		// ... or using an <aside class="notes"> element
+		var notesElement = slide.querySelector( 'aside.notes' );
+		if( notesElement ) {
+			return notesElement.innerHTML;
+		}
+
+		return null;
+
+	}
+
+	/**
+	 * Retrieves the current state of the presentation as
+	 * an object. This state can then be restored at any
+	 * time.
+	 *
+	 * @return {{indexh: number, indexv: number, indexf: number, paused: boolean, overview: boolean}}
+	 */
+	function getState() {
+
+		var indices = getIndices();
+
+		return {
+			indexh: indices.h,
+			indexv: indices.v,
+			indexf: indices.f,
+			paused: isPaused(),
+			overview: isOverview()
+		};
+
+	}
+
+	/**
+	 * Restores the presentation to the given state.
+	 *
+	 * @param {object} state As generated by getState()
+	 * @see {@link getState} generates the parameter `state`
+	 */
+	function setState( state ) {
+
+		if( typeof state === 'object' ) {
+			slide( deserialize( state.indexh ), deserialize( state.indexv ), deserialize( state.indexf ) );
+
+			var pausedFlag = deserialize( state.paused ),
+				overviewFlag = deserialize( state.overview );
+
+			if( typeof pausedFlag === 'boolean' && pausedFlag !== isPaused() ) {
+				togglePause( pausedFlag );
+			}
+
+			if( typeof overviewFlag === 'boolean' && overviewFlag !== isOverview() ) {
+				toggleOverview( overviewFlag );
+			}
+		}
+
+	}
+
+	/**
+	 * Return a sorted fragments list, ordered by an increasing
+	 * "data-fragment-index" attribute.
+	 *
+	 * Fragments will be revealed in the order that they are returned by
+	 * this function, so you can use the index attributes to control the
+	 * order of fragment appearance.
+	 *
+	 * To maintain a sensible default fragment order, fragments are presumed
+	 * to be passed in document order. This function adds a "fragment-index"
+	 * attribute to each node if such an attribute is not already present,
+	 * and sets that attribute to an integer value which is the position of
+	 * the fragment within the fragments list.
+	 *
+	 * @param {object[]|*} fragments
+	 * @return {object[]} sorted Sorted array of fragments
+	 */
+	function sortFragments( fragments ) {
+
+		fragments = toArray( fragments );
+
+		var ordered = [],
+			unordered = [],
+			sorted = [];
+
+		// Group ordered and unordered elements
+		fragments.forEach( function( fragment, i ) {
+			if( fragment.hasAttribute( 'data-fragment-index' ) ) {
+				var index = parseInt( fragment.getAttribute( 'data-fragment-index' ), 10 );
+
+				if( !ordered[index] ) {
+					ordered[index] = [];
+				}
+
+				ordered[index].push( fragment );
+			}
+			else {
+				unordered.push( [ fragment ] );
+			}
+		} );
+
+		// Append fragments without explicit indices in their
+		// DOM order
+		ordered = ordered.concat( unordered );
+
+		// Manually count the index up per group to ensure there
+		// are no gaps
+		var index = 0;
+
+		// Push all fragments in their sorted order to an array,
+		// this flattens the groups
+		ordered.forEach( function( group ) {
+			group.forEach( function( fragment ) {
+				sorted.push( fragment );
+				fragment.setAttribute( 'data-fragment-index', index );
+			} );
+
+			index ++;
+		} );
+
+		return sorted;
+
+	}
+
+	/**
+	 * Navigate to the specified slide fragment.
+	 *
+	 * @param {?number} index The index of the fragment that
+	 * should be shown, -1 means all are invisible
+	 * @param {number} offset Integer offset to apply to the
+	 * fragment index
+	 *
+	 * @return {boolean} true if a change was made in any
+	 * fragments visibility as part of this call
+	 */
+	function navigateFragment( index, offset ) {
+
+		if( currentSlide && config.fragments ) {
+
+			var fragments = sortFragments( currentSlide.querySelectorAll( '.fragment' ) );
+			if( fragments.length ) {
+
+				// If no index is specified, find the current
+				if( typeof index !== 'number' ) {
+					var lastVisibleFragment = sortFragments( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop();
+
+					if( lastVisibleFragment ) {
+						index = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
+					}
+					else {
+						index = -1;
+					}
+				}
+
+				// If an offset is specified, apply it to the index
+				if( typeof offset === 'number' ) {
+					index += offset;
+				}
+
+				var fragmentsShown = [],
+					fragmentsHidden = [];
+
+				toArray( fragments ).forEach( function( element, i ) {
+
+					if( element.hasAttribute( 'data-fragment-index' ) ) {
+						i = parseInt( element.getAttribute( 'data-fragment-index' ), 10 );
+					}
+
+					// Visible fragments
+					if( i <= index ) {
+						if( !element.classList.contains( 'visible' ) ) fragmentsShown.push( element );
+						element.classList.add( 'visible' );
+						element.classList.remove( 'current-fragment' );
+
+						// Announce the fragments one by one to the Screen Reader
+						dom.statusDiv.textContent = getStatusText( element );
+
+						if( i === index ) {
+							element.classList.add( 'current-fragment' );
+							startEmbeddedContent( element );
+						}
+					}
+					// Hidden fragments
+					else {
+						if( element.classList.contains( 'visible' ) ) fragmentsHidden.push( element );
+						element.classList.remove( 'visible' );
+						element.classList.remove( 'current-fragment' );
+					}
+
+				} );
+
+				if( fragmentsHidden.length ) {
+					dispatchEvent( 'fragmenthidden', { fragment: fragmentsHidden[0], fragments: fragmentsHidden } );
+				}
+
+				if( fragmentsShown.length ) {
+					dispatchEvent( 'fragmentshown', { fragment: fragmentsShown[0], fragments: fragmentsShown } );
+				}
+
+				updateControls();
+				updateProgress();
+
+				return !!( fragmentsShown.length || fragmentsHidden.length );
+
+			}
+
+		}
+
+		return false;
+
+	}
+
+	/**
+	 * Navigate to the next slide fragment.
+	 *
+	 * @return {boolean} true if there was a next fragment,
+	 * false otherwise
+	 */
+	function nextFragment() {
+
+		return navigateFragment( null, 1 );
+
+	}
+
+	/**
+	 * Navigate to the previous slide fragment.
+	 *
+	 * @return {boolean} true if there was a previous fragment,
+	 * false otherwise
+	 */
+	function previousFragment() {
+
+		return navigateFragment( null, -1 );
+
+	}
+
+	/**
+	 * Cues a new automated slide if enabled in the config.
+	 */
+	function cueAutoSlide() {
+
+		cancelAutoSlide();
+
+		if( currentSlide ) {
+
+			var fragment = currentSlide.querySelector( '.current-fragment' );
+
+			// When the slide first appears there is no "current" fragment so
+			// we look for a data-autoslide timing on the first fragment
+			if( !fragment ) fragment = currentSlide.querySelector( '.fragment' );
+
+			var fragmentAutoSlide = fragment ? fragment.getAttribute( 'data-autoslide' ) : null;
+			var parentAutoSlide = currentSlide.parentNode ? currentSlide.parentNode.getAttribute( 'data-autoslide' ) : null;
+			var slideAutoSlide = currentSlide.getAttribute( 'data-autoslide' );
+
+			// Pick value in the following priority order:
+			// 1. Current fragment's data-autoslide
+			// 2. Current slide's data-autoslide
+			// 3. Parent slide's data-autoslide
+			// 4. Global autoSlide setting
+			if( fragmentAutoSlide ) {
+				autoSlide = parseInt( fragmentAutoSlide, 10 );
+			}
+			else if( slideAutoSlide ) {
+				autoSlide = parseInt( slideAutoSlide, 10 );
+			}
+			else if( parentAutoSlide ) {
+				autoSlide = parseInt( parentAutoSlide, 10 );
+			}
+			else {
+				autoSlide = config.autoSlide;
+			}
+
+			// If there are media elements with data-autoplay,
+			// automatically set the autoSlide duration to the
+			// length of that media. Not applicable if the slide
+			// is divided up into fragments.
+			// playbackRate is accounted for in the duration.
+			if( currentSlide.querySelectorAll( '.fragment' ).length === 0 ) {
+				toArray( currentSlide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
+					if( el.hasAttribute( 'data-autoplay' ) ) {
+						if( autoSlide && (el.duration * 1000 / el.playbackRate ) > autoSlide ) {
+							autoSlide = ( el.duration * 1000 / el.playbackRate ) + 1000;
+						}
+					}
+				} );
+			}
+
+			// Cue the next auto-slide if:
+			// - There is an autoSlide value
+			// - Auto-sliding isn't paused by the user
+			// - The presentation isn't paused
+			// - The overview isn't active
+			// - The presentation isn't over
+			if( autoSlide && !autoSlidePaused && !isPaused() && !isOverview() && ( !Reveal.isLastSlide() || availableFragments().next || config.loop === true ) ) {
+				autoSlideTimeout = setTimeout( function() {
+					typeof config.autoSlideMethod === 'function' ? config.autoSlideMethod() : navigateNext();
+					cueAutoSlide();
+				}, autoSlide );
+				autoSlideStartTime = Date.now();
+			}
+
+			if( autoSlidePlayer ) {
+				autoSlidePlayer.setPlaying( autoSlideTimeout !== -1 );
+			}
+
+		}
+
+	}
+
+	/**
+	 * Cancels any ongoing request to auto-slide.
+	 */
+	function cancelAutoSlide() {
+
+		clearTimeout( autoSlideTimeout );
+		autoSlideTimeout = -1;
+
+	}
+
+	function pauseAutoSlide() {
+
+		if( autoSlide && !autoSlidePaused ) {
+			autoSlidePaused = true;
+			dispatchEvent( 'autoslidepaused' );
+			clearTimeout( autoSlideTimeout );
+
+			if( autoSlidePlayer ) {
+				autoSlidePlayer.setPlaying( false );
+			}
+		}
+
+	}
+
+	function resumeAutoSlide() {
+
+		if( autoSlide && autoSlidePaused ) {
+			autoSlidePaused = false;
+			dispatchEvent( 'autoslideresumed' );
+			cueAutoSlide();
+		}
+
+	}
+
+	function navigateLeft() {
+
+		// Reverse for RTL
+		if( config.rtl ) {
+			if( ( isOverview() || nextFragment() === false ) && availableRoutes().left ) {
+				slide( indexh + 1 );
+			}
+		}
+		// Normal navigation
+		else if( ( isOverview() || previousFragment() === false ) && availableRoutes().left ) {
+			slide( indexh - 1 );
+		}
+
+	}
+
+	function navigateRight() {
+
+		// Reverse for RTL
+		if( config.rtl ) {
+			if( ( isOverview() || previousFragment() === false ) && availableRoutes().right ) {
+				slide( indexh - 1 );
+			}
+		}
+		// Normal navigation
+		else if( ( isOverview() || nextFragment() === false ) && availableRoutes().right ) {
+			slide( indexh + 1 );
+		}
+
+	}
+
+	function navigateUp() {
+
+		// Prioritize hiding fragments
+		if( ( isOverview() || previousFragment() === false ) && availableRoutes().up ) {
+			slide( indexh, indexv - 1 );
+		}
+
+	}
+
+	function navigateDown() {
+
+		// Prioritize revealing fragments
+		if( ( isOverview() || nextFragment() === false ) && availableRoutes().down ) {
+			slide( indexh, indexv + 1 );
+		}
+
+	}
+
+	/**
+	 * Navigates backwards, prioritized in the following order:
+	 * 1) Previous fragment
+	 * 2) Previous vertical slide
+	 * 3) Previous horizontal slide
+	 */
+	function navigatePrev() {
+
+		// Prioritize revealing fragments
+		if( previousFragment() === false ) {
+			if( availableRoutes().up ) {
+				navigateUp();
+			}
+			else {
+				// Fetch the previous horizontal slide, if there is one
+				var previousSlide;
+
+				if( config.rtl ) {
+					previousSlide = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.future' ) ).pop();
+				}
+				else {
+					previousSlide = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.past' ) ).pop();
+				}
+
+				if( previousSlide ) {
+					var v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined;
+					var h = indexh - 1;
+					slide( h, v );
+				}
+			}
+		}
+
+	}
+
+	/**
+	 * The reverse of #navigatePrev().
+	 */
+	function navigateNext() {
+
+		// Prioritize revealing fragments
+		if( nextFragment() === false ) {
+			if( availableRoutes().down ) {
+				navigateDown();
+			}
+			else if( config.rtl ) {
+				navigateLeft();
+			}
+			else {
+				navigateRight();
+			}
+		}
+
+	}
+
+	/**
+	 * Checks if the target element prevents the triggering of
+	 * swipe navigation.
+	 */
+	function isSwipePrevented( target ) {
+
+		while( target && typeof target.hasAttribute === 'function' ) {
+			if( target.hasAttribute( 'data-prevent-swipe' ) ) return true;
+			target = target.parentNode;
+		}
+
+		return false;
+
+	}
+
+
+	// --------------------------------------------------------------------//
+	// ----------------------------- EVENTS -------------------------------//
+	// --------------------------------------------------------------------//
+
+	/**
+	 * Called by all event handlers that are based on user
+	 * input.
+	 *
+	 * @param {object} [event]
+	 */
+	function onUserInput( event ) {
+
+		if( config.autoSlideStoppable ) {
+			pauseAutoSlide();
+		}
+
+	}
+
+	/**
+	 * Handler for the document level 'keypress' event.
+	 *
+	 * @param {object} event
+	 */
+	function onDocumentKeyPress( event ) {
+
+		// Check if the pressed key is question mark
+		if( event.shiftKey && event.charCode === 63 ) {
+			toggleHelp();
+		}
+
+	}
+
+	/**
+	 * Handler for the document level 'keydown' event.
+	 *
+	 * @param {object} event
+	 */
+	function onDocumentKeyDown( event ) {
+
+		// If there's a condition specified and it returns false,
+		// ignore this event
+		if( typeof config.keyboardCondition === 'function' && config.keyboardCondition() === false ) {
+			return true;
+		}
+
+		// Remember if auto-sliding was paused so we can toggle it
+		var autoSlideWasPaused = autoSlidePaused;
+
+		onUserInput( event );
+
+		// Check if there's a focused element that could be using
+		// the keyboard
+		var activeElementIsCE = document.activeElement && document.activeElement.contentEditable !== 'inherit';
+		var activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName );
+		var activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);
+
+		// Disregard the event if there's a focused element or a
+		// keyboard modifier key is present
+		if( activeElementIsCE || activeElementIsInput || activeElementIsNotes || (event.shiftKey && event.keyCode !== 32) || event.altKey || event.ctrlKey || event.metaKey ) return;
+
+		// While paused only allow resume keyboard events; 'b', 'v', '.'
+		var resumeKeyCodes = [66,86,190,191];
+		var key;
+
+		// Custom key bindings for togglePause should be able to resume
+		if( typeof config.keyboard === 'object' ) {
+			for( key in config.keyboard ) {
+				if( config.keyboard[key] === 'togglePause' ) {
+					resumeKeyCodes.push( parseInt( key, 10 ) );
+				}
+			}
+		}
+
+		if( isPaused() && resumeKeyCodes.indexOf( event.keyCode ) === -1 ) {
+			return false;
+		}
+
+		var triggered = false;
+
+		// 1. User defined key bindings
+		if( typeof config.keyboard === 'object' ) {
+
+			for( key in config.keyboard ) {
+
+				// Check if this binding matches the pressed key
+				if( parseInt( key, 10 ) === event.keyCode ) {
+
+					var value = config.keyboard[ key ];
+
+					// Callback function
+					if( typeof value === 'function' ) {
+						value.apply( null, [ event ] );
+					}
+					// String shortcuts to reveal.js API
+					else if( typeof value === 'string' && typeof Reveal[ value ] === 'function' ) {
+						Reveal[ value ].call();
+					}
+
+					triggered = true;
+
+				}
+
+			}
+
+		}
+
+		// 2. System defined key bindings
+		if( triggered === false ) {
+
+			// Assume true and try to prove false
+			triggered = true;
+
+			switch( event.keyCode ) {
+				// p, page up
+				case 80: case 33: navigatePrev(); break;
+				// n, page down
+				case 78: case 34: navigateNext(); break;
+				// h, left
+				case 72: case 37: navigateLeft(); break;
+				// l, right
+				case 76: case 39: navigateRight(); break;
+				// k, up
+				case 75: case 38: navigateUp(); break;
+				// j, down
+				case 74: case 40: navigateDown(); break;
+				// home
+				case 36: slide( 0 ); break;
+				// end
+				case 35: slide( Number.MAX_VALUE ); break;
+				// space
+				case 32: isOverview() ? deactivateOverview() : event.shiftKey ? navigatePrev() : navigateNext(); break;
+				// return
+				case 13: isOverview() ? deactivateOverview() : triggered = false; break;
+				// two-spot, semicolon, b, v, period, Logitech presenter tools "black screen" button
+				case 58: case 59: case 66: case 86: case 190: case 191: togglePause(); break;
+				// f
+				case 70: enterFullscreen(); break;
+				// a
+				case 65: if ( config.autoSlideStoppable ) toggleAutoSlide( autoSlideWasPaused ); break;
+				default:
+					triggered = false;
+			}
+
+		}
+
+		// If the input resulted in a triggered action we should prevent
+		// the browsers default behavior
+		if( triggered ) {
+			event.preventDefault && event.preventDefault();
+		}
+		// ESC or O key
+		else if ( ( event.keyCode === 27 || event.keyCode === 79 ) && features.transforms3d ) {
+			if( dom.overlay ) {
+				closeOverlay();
+			}
+			else {
+				toggleOverview();
+			}
+
+			event.preventDefault && event.preventDefault();
+		}
+
+		// If auto-sliding is enabled we need to cue up
+		// another timeout
+		cueAutoSlide();
+
+	}
+
+	/**
+	 * Handler for the 'touchstart' event, enables support for
+	 * swipe and pinch gestures.
+	 *
+	 * @param {object} event
+	 */
+	function onTouchStart( event ) {
+
+		if( isSwipePrevented( event.target ) ) return true;
+
+		touch.startX = event.touches[0].clientX;
+		touch.startY = event.touches[0].clientY;
+		touch.startCount = event.touches.length;
+
+		// If there's two touches we need to memorize the distance
+		// between those two points to detect pinching
+		if( event.touches.length === 2 && config.overview ) {
+			touch.startSpan = distanceBetween( {
+				x: event.touches[1].clientX,
+				y: event.touches[1].clientY
+			}, {
+				x: touch.startX,
+				y: touch.startY
+			} );
+		}
+
+	}
+
+	/**
+	 * Handler for the 'touchmove' event.
+	 *
+	 * @param {object} event
+	 */
+	function onTouchMove( event ) {
+
+		if( isSwipePrevented( event.target ) ) return true;
+
+		// Each touch should only trigger one action
+		if( !touch.captured ) {
+			onUserInput( event );
+
+			var currentX = event.touches[0].clientX;
+			var currentY = event.touches[0].clientY;
+
+			// If the touch started with two points and still has
+			// two active touches; test for the pinch gesture
+			if( event.touches.length === 2 && touch.startCount === 2 && config.overview ) {
+
+				// The current distance in pixels between the two touch points
+				var currentSpan = distanceBetween( {
+					x: event.touches[1].clientX,
+					y: event.touches[1].clientY
+				}, {
+					x: touch.startX,
+					y: touch.startY
+				} );
+
+				// If the span is larger than the desire amount we've got
+				// ourselves a pinch
+				if( Math.abs( touch.startSpan - currentSpan ) > touch.threshold ) {
+					touch.captured = true;
+
+					if( currentSpan < touch.startSpan ) {
+						activateOverview();
+					}
+					else {
+						deactivateOverview();
+					}
+				}
+
+				event.preventDefault();
+
+			}
+			// There was only one touch point, look for a swipe
+			else if( event.touches.length === 1 && touch.startCount !== 2 ) {
+
+				var deltaX = currentX - touch.startX,
+					deltaY = currentY - touch.startY;
+
+				if( deltaX > touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
+					touch.captured = true;
+					navigateLeft();
+				}
+				else if( deltaX < -touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
+					touch.captured = true;
+					navigateRight();
+				}
+				else if( deltaY > touch.threshold ) {
+					touch.captured = true;
+					navigateUp();
+				}
+				else if( deltaY < -touch.threshold ) {
+					touch.captured = true;
+					navigateDown();
+				}
+
+				// If we're embedded, only block touch events if they have
+				// triggered an action
+				if( config.embedded ) {
+					if( touch.captured || isVerticalSlide( currentSlide ) ) {
+						event.preventDefault();
+					}
+				}
+				// Not embedded? Block them all to avoid needless tossing
+				// around of the viewport in iOS
+				else {
+					event.preventDefault();
+				}
+
+			}
+		}
+		// There's a bug with swiping on some Android devices unless
+		// the default action is always prevented
+		else if( UA.match( /android/gi ) ) {
+			event.preventDefault();
+		}
+
+	}
+
+	/**
+	 * Handler for the 'touchend' event.
+	 *
+	 * @param {object} event
+	 */
+	function onTouchEnd( event ) {
+
+		touch.captured = false;
+
+	}
+
+	/**
+	 * Convert pointer down to touch start.
+	 *
+	 * @param {object} event
+	 */
+	function onPointerDown( event ) {
+
+		if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" ) {
+			event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
+			onTouchStart( event );
+		}
+
+	}
+
+	/**
+	 * Convert pointer move to touch move.
+	 *
+	 * @param {object} event
+	 */
+	function onPointerMove( event ) {
+
+		if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" )  {
+			event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
+			onTouchMove( event );
+		}
+
+	}
+
+	/**
+	 * Convert pointer up to touch end.
+	 *
+	 * @param {object} event
+	 */
+	function onPointerUp( event ) {
+
+		if( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === "touch" )  {
+			event.touches = [{ clientX: event.clientX, clientY: event.clientY }];
+			onTouchEnd( event );
+		}
+
+	}
+
+	/**
+	 * Handles mouse wheel scrolling, throttled to avoid skipping
+	 * multiple slides.
+	 *
+	 * @param {object} event
+	 */
+	function onDocumentMouseScroll( event ) {
+
+		if( Date.now() - lastMouseWheelStep > 600 ) {
+
+			lastMouseWheelStep = Date.now();
+
+			var delta = event.detail || -event.wheelDelta;
+			if( delta > 0 ) {
+				navigateNext();
+			}
+			else if( delta < 0 ) {
+				navigatePrev();
+			}
+
+		}
+
+	}
+
+	/**
+	 * Clicking on the progress bar results in a navigation to the
+	 * closest approximate horizontal slide using this equation:
+	 *
+	 * ( clickX / presentationWidth ) * numberOfSlides
+	 *
+	 * @param {object} event
+	 */
+	function onProgressClicked( event ) {
+
+		onUserInput( event );
+
+		event.preventDefault();
+
+		var slidesTotal = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).length;
+		var slideIndex = Math.floor( ( event.clientX / dom.wrapper.offsetWidth ) * slidesTotal );
+
+		if( config.rtl ) {
+			slideIndex = slidesTotal - slideIndex;
+		}
+
+		slide( slideIndex );
+
+	}
+
+	/**
+	 * Event handler for navigation control buttons.
+	 */
+	function onNavigateLeftClicked( event ) { event.preventDefault(); onUserInput(); navigateLeft(); }
+	function onNavigateRightClicked( event ) { event.preventDefault(); onUserInput(); navigateRight(); }
+	function onNavigateUpClicked( event ) { event.preventDefault(); onUserInput(); navigateUp(); }
+	function onNavigateDownClicked( event ) { event.preventDefault(); onUserInput(); navigateDown(); }
+	function onNavigatePrevClicked( event ) { event.preventDefault(); onUserInput(); navigatePrev(); }
+	function onNavigateNextClicked( event ) { event.preventDefault(); onUserInput(); navigateNext(); }
+
+	/**
+	 * Handler for the window level 'hashchange' event.
+	 *
+	 * @param {object} [event]
+	 */
+	function onWindowHashChange( event ) {
+
+		readURL();
+
+	}
+
+	/**
+	 * Handler for the window level 'resize' event.
+	 *
+	 * @param {object} [event]
+	 */
+	function onWindowResize( event ) {
+
+		layout();
+
+	}
+
+	/**
+	 * Handle for the window level 'visibilitychange' event.
+	 *
+	 * @param {object} [event]
+	 */
+	function onPageVisibilityChange( event ) {
+
+		var isHidden =  document.webkitHidden ||
+						document.msHidden ||
+						document.hidden;
+
+		// If, after clicking a link or similar and we're coming back,
+		// focus the document.body to ensure we can use keyboard shortcuts
+		if( isHidden === false && document.activeElement !== document.body ) {
+			// Not all elements support .blur() - SVGs among them.
+			if( typeof document.activeElement.blur === 'function' ) {
+				document.activeElement.blur();
+			}
+			document.body.focus();
+		}
+
+	}
+
+	/**
+	 * Invoked when a slide is and we're in the overview.
+	 *
+	 * @param {object} event
+	 */
+	function onOverviewSlideClicked( event ) {
+
+		// TODO There's a bug here where the event listeners are not
+		// removed after deactivating the overview.
+		if( eventsAreBound && isOverview() ) {
+			event.preventDefault();
+
+			var element = event.target;
+
+			while( element && !element.nodeName.match( /section/gi ) ) {
+				element = element.parentNode;
+			}
+
+			if( element && !element.classList.contains( 'disabled' ) ) {
+
+				deactivateOverview();
+
+				if( element.nodeName.match( /section/gi ) ) {
+					var h = parseInt( element.getAttribute( 'data-index-h' ), 10 ),
+						v = parseInt( element.getAttribute( 'data-index-v' ), 10 );
+
+					slide( h, v );
+				}
+
+			}
+		}
+
+	}
+
+	/**
+	 * Handles clicks on links that are set to preview in the
+	 * iframe overlay.
+	 *
+	 * @param {object} event
+	 */
+	function onPreviewLinkClicked( event ) {
+
+		if( event.currentTarget && event.currentTarget.hasAttribute( 'href' ) ) {
+			var url = event.currentTarget.getAttribute( 'href' );
+			if( url ) {
+				showPreview( url );
+				event.preventDefault();
+			}
+		}
+
+	}
+
+	/**
+	 * Handles click on the auto-sliding controls element.
+	 *
+	 * @param {object} [event]
+	 */
+	function onAutoSlidePlayerClick( event ) {
+
+		// Replay
+		if( Reveal.isLastSlide() && config.loop === false ) {
+			slide( 0, 0 );
+			resumeAutoSlide();
+		}
+		// Resume
+		else if( autoSlidePaused ) {
+			resumeAutoSlide();
+		}
+		// Pause
+		else {
+			pauseAutoSlide();
+		}
+
+	}
+
+
+	// --------------------------------------------------------------------//
+	// ------------------------ PLAYBACK COMPONENT ------------------------//
+	// --------------------------------------------------------------------//
+
+
+	/**
+	 * Constructor for the playback component, which displays
+	 * play/pause/progress controls.
+	 *
+	 * @param {HTMLElement} container The component will append
+	 * itself to this
+	 * @param {function} progressCheck A method which will be
+	 * called frequently to get the current progress on a range
+	 * of 0-1
+	 */
+	function Playback( container, progressCheck ) {
+
+		// Cosmetics
+		this.diameter = 100;
+		this.diameter2 = this.diameter/2;
+		this.thickness = 6;
+
+		// Flags if we are currently playing
+		this.playing = false;
+
+		// Current progress on a 0-1 range
+		this.progress = 0;
+
+		// Used to loop the animation smoothly
+		this.progressOffset = 1;
+
+		this.container = container;
+		this.progressCheck = progressCheck;
+
+		this.canvas = document.createElement( 'canvas' );
+		this.canvas.className = 'playback';
+		this.canvas.width = this.diameter;
+		this.canvas.height = this.diameter;
+		this.canvas.style.width = this.diameter2 + 'px';
+		this.canvas.style.height = this.diameter2 + 'px';
+		this.context = this.canvas.getContext( '2d' );
+
+		this.container.appendChild( this.canvas );
+
+		this.render();
+
+	}
+
+	/**
+	 * @param value
+	 */
+	Playback.prototype.setPlaying = function( value ) {
+
+		var wasPlaying = this.playing;
+
+		this.playing = value;
+
+		// Start repainting if we weren't already
+		if( !wasPlaying && this.playing ) {
+			this.animate();
+		}
+		else {
+			this.render();
+		}
+
+	};
+
+	Playback.prototype.animate = function() {
+
+		var progressBefore = this.progress;
+
+		this.progress = this.progressCheck();
+
+		// When we loop, offset the progress so that it eases
+		// smoothly rather than immediately resetting
+		if( progressBefore > 0.8 && this.progress < 0.2 ) {
+			this.progressOffset = this.progress;
+		}
+
+		this.render();
+
+		if( this.playing ) {
+			features.requestAnimationFrameMethod.call( window, this.animate.bind( this ) );
+		}
+
+	};
+
+	/**
+	 * Renders the current progress and playback state.
+	 */
+	Playback.prototype.render = function() {
+
+		var progress = this.playing ? this.progress : 0,
+			radius = ( this.diameter2 ) - this.thickness,
+			x = this.diameter2,
+			y = this.diameter2,
+			iconSize = 28;
+
+		// Ease towards 1
+		this.progressOffset += ( 1 - this.progressOffset ) * 0.1;
+
+		var endAngle = ( - Math.PI / 2 ) + ( progress * ( Math.PI * 2 ) );
+		var startAngle = ( - Math.PI / 2 ) + ( this.progressOffset * ( Math.PI * 2 ) );
+
+		this.context.save();
+		this.context.clearRect( 0, 0, this.diameter, this.diameter );
+
+		// Solid background color
+		this.context.beginPath();
+		this.context.arc( x, y, radius + 4, 0, Math.PI * 2, false );
+		this.context.fillStyle = 'rgba( 0, 0, 0, 0.4 )';
+		this.context.fill();
+
+		// Draw progress track
+		this.context.beginPath();
+		this.context.arc( x, y, radius, 0, Math.PI * 2, false );
+		this.context.lineWidth = this.thickness;
+		this.context.strokeStyle = '#666';
+		this.context.stroke();
+
+		if( this.playing ) {
+			// Draw progress on top of track
+			this.context.beginPath();
+			this.context.arc( x, y, radius, startAngle, endAngle, false );
+			this.context.lineWidth = this.thickness;
+			this.context.strokeStyle = '#fff';
+			this.context.stroke();
+		}
+
+		this.context.translate( x - ( iconSize / 2 ), y - ( iconSize / 2 ) );
+
+		// Draw play/pause icons
+		if( this.playing ) {
+			this.context.fillStyle = '#fff';
+			this.context.fillRect( 0, 0, iconSize / 2 - 4, iconSize );
+			this.context.fillRect( iconSize / 2 + 4, 0, iconSize / 2 - 4, iconSize );
+		}
+		else {
+			this.context.beginPath();
+			this.context.translate( 4, 0 );
+			this.context.moveTo( 0, 0 );
+			this.context.lineTo( iconSize - 4, iconSize / 2 );
+			this.context.lineTo( 0, iconSize );
+			this.context.fillStyle = '#fff';
+			this.context.fill();
+		}
+
+		this.context.restore();
+
+	};
+
+	Playback.prototype.on = function( type, listener ) {
+		this.canvas.addEventListener( type, listener, false );
+	};
+
+	Playback.prototype.off = function( type, listener ) {
+		this.canvas.removeEventListener( type, listener, false );
+	};
+
+	Playback.prototype.destroy = function() {
+
+		this.playing = false;
+
+		if( this.canvas.parentNode ) {
+			this.container.removeChild( this.canvas );
+		}
+
+	};
+
+
+	// --------------------------------------------------------------------//
+	// ------------------------------- API --------------------------------//
+	// --------------------------------------------------------------------//
+
+
+	Reveal = {
+		VERSION: VERSION,
+
+		initialize: initialize,
+		configure: configure,
+		sync: sync,
+
+		// Navigation methods
+		slide: slide,
+		left: navigateLeft,
+		right: navigateRight,
+		up: navigateUp,
+		down: navigateDown,
+		prev: navigatePrev,
+		next: navigateNext,
+
+		// Fragment methods
+		navigateFragment: navigateFragment,
+		prevFragment: previousFragment,
+		nextFragment: nextFragment,
+
+		// Deprecated aliases
+		navigateTo: slide,
+		navigateLeft: navigateLeft,
+		navigateRight: navigateRight,
+		navigateUp: navigateUp,
+		navigateDown: navigateDown,
+		navigatePrev: navigatePrev,
+		navigateNext: navigateNext,
+
+		// Forces an update in slide layout
+		layout: layout,
+
+		// Randomizes the order of slides
+		shuffle: shuffle,
+
+		// Returns an object with the available routes as booleans (left/right/top/bottom)
+		availableRoutes: availableRoutes,
+
+		// Returns an object with the available fragments as booleans (prev/next)
+		availableFragments: availableFragments,
+
+		// Toggles a help overlay with keyboard shortcuts
+		toggleHelp: toggleHelp,
+
+		// Toggles the overview mode on/off
+		toggleOverview: toggleOverview,
+
+		// Toggles the "black screen" mode on/off
+		togglePause: togglePause,
+
+		// Toggles the auto slide mode on/off
+		toggleAutoSlide: toggleAutoSlide,
+
+		// State checks
+		isOverview: isOverview,
+		isPaused: isPaused,
+		isAutoSliding: isAutoSliding,
+
+		// Adds or removes all internal event listeners (such as keyboard)
+		addEventListeners: addEventListeners,
+		removeEventListeners: removeEventListeners,
+
+		// Facility for persisting and restoring the presentation state
+		getState: getState,
+		setState: setState,
+
+		// Presentation progress
+		getSlidePastCount: getSlidePastCount,
+
+		// Presentation progress on range of 0-1
+		getProgress: getProgress,
+
+		// Returns the indices of the current, or specified, slide
+		getIndices: getIndices,
+
+		// Returns an Array of all slides
+		getSlides: getSlides,
+
+		// Returns the total number of slides
+		getTotalSlides: getTotalSlides,
+
+		// Returns the slide element at the specified index
+		getSlide: getSlide,
+
+		// Returns the slide background element at the specified index
+		getSlideBackground: getSlideBackground,
+
+		// Returns the speaker notes string for a slide, or null
+		getSlideNotes: getSlideNotes,
+
+		// Returns the previous slide element, may be null
+		getPreviousSlide: function() {
+			return previousSlide;
+		},
+
+		// Returns the current slide element
+		getCurrentSlide: function() {
+			return currentSlide;
+		},
+
+		// Returns the current scale of the presentation content
+		getScale: function() {
+			return scale;
+		},
+
+		// Returns the current configuration object
+		getConfig: function() {
+			return config;
+		},
+
+		// Helper method, retrieves query string as a key/value hash
+		getQueryHash: function() {
+			var query = {};
+
+			location.search.replace( /[A-Z0-9]+?=([\w\.%-]*)/gi, function(a) {
+				query[ a.split( '=' ).shift() ] = a.split( '=' ).pop();
+			} );
+
+			// Basic deserialization
+			for( var i in query ) {
+				var value = query[ i ];
+
+				query[ i ] = deserialize( unescape( value ) );
+			}
+
+			return query;
+		},
+
+		// Returns true if we're currently on the first slide
+		isFirstSlide: function() {
+			return ( indexh === 0 && indexv === 0 );
+		},
+
+		// Returns true if we're currently on the last slide
+		isLastSlide: function() {
+			if( currentSlide ) {
+				// Does this slide has next a sibling?
+				if( currentSlide.nextElementSibling ) return false;
+
+				// If it's vertical, does its parent have a next sibling?
+				if( isVerticalSlide( currentSlide ) && currentSlide.parentNode.nextElementSibling ) return false;
+
+				return true;
+			}
+
+			return false;
+		},
+
+		// Checks if reveal.js has been loaded and is ready for use
+		isReady: function() {
+			return loaded;
+		},
+
+		// Forward event binding to the reveal DOM element
+		addEventListener: function( type, listener, useCapture ) {
+			if( 'addEventListener' in window ) {
+				( dom.wrapper || document.querySelector( '.reveal' ) ).addEventListener( type, listener, useCapture );
+			}
+		},
+		removeEventListener: function( type, listener, useCapture ) {
+			if( 'addEventListener' in window ) {
+				( dom.wrapper || document.querySelector( '.reveal' ) ).removeEventListener( type, listener, useCapture );
+			}
+		},
+
+		// Programatically triggers a keyboard event
+		triggerKey: function( keyCode ) {
+			onDocumentKeyDown( { keyCode: keyCode } );
+		},
+
+		// Registers a new shortcut to include in the help overlay
+		registerKeyboardShortcut: function( key, value ) {
+			keyboardShortcuts[key] = value;
+		}
+	};
+
+	return Reveal;
+
+}));

pres/reveal.js-master/lib/css/zenburn.css

+/*
+
+Zenburn style from voldmar.ru (c) Vladimir Epifanov <voldmar@voldmar.ru>
+based on dark.css by Ivan Sagalaev
+
+*/
+
+.hljs {
+  display: block;
+  overflow-x: auto;
+  padding: 0.5em;
+  background: #3f3f3f;
+  color: #dcdcdc;
+}
+
+.hljs-keyword,
+.hljs-selector-tag,
+.hljs-tag {
+  color: #e3ceab;
+}
+
+.hljs-template-tag {
+  color: #dcdcdc;
+}
+
+.hljs-number {
+  color: #8cd0d3;
+}
+
+.hljs-variable,
+.hljs-template-variable,
+.hljs-attribute {
+  color: #efdcbc;
+}
+
+.hljs-literal {
+  color: #efefaf;
+}
+
+.hljs-subst {
+  color: #8f8f8f;
+}
+
+.hljs-title,
+.hljs-name,
+.hljs-selector-id,
+.hljs-selector-class,
+.hljs-section,
+.hljs-type {
+  color: #efef8f;
+}
+
+.hljs-symbol,
+.hljs-bullet,
+.hljs-link {
+  color: #dca3a3;
+}
+
+.hljs-deletion,
+.hljs-string,
+.hljs-built_in,
+.hljs-builtin-name {
+  color: #cc9393;
+}
+
+.hljs-addition,
+.hljs-comment,
+.hljs-quote,
+.hljs-meta {
+  color: #7f9f7f;
+}
+
+
+.hljs-emphasis {
+  font-style: italic;
+}
+
+.hljs-strong {
+  font-weight: bold;
+}

pres/reveal.js-master/lib/font/league-gothic/LICENSE

+SIL Open Font License (OFL)
+http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL

pres/reveal.js-master/lib/font/league-gothic/league-gothic.css

+@font-face {
+    font-family: 'League Gothic';
+    src: url('league-gothic.eot');
+    src: url('league-gothic.eot?#iefix') format('embedded-opentype'),
+         url('league-gothic.woff') format('woff'),
+         url('league-gothic.ttf') format('truetype');
+
+    font-weight: normal;
+    font-style: normal;
+}
\ No newline at end of file

pres/reveal.js-master/lib/font/source-sans-pro/LICENSE

+SIL Open Font License
+
+Copyright 2010, 2012 Adobe Systems Incorporated (http://www.adobe.com/), with Reserved Font Name ‘Source’. All Rights Reserved. Source is a trademark of Adobe Systems Incorporated in the United States and/or other countries.
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL
+
+—————————————————————————————-
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+—————————————————————————————-
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide development of collaborative font projects, to support the font creation efforts of academic and linguistic communities, and to provide a free and open framework in which fonts may be shared and improved in partnership with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and redistributed freely as long as they are not sold by themselves. The fonts, including any derivative works, can be bundled, embedded, redistributed and/or sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives, however, cannot be released under any other type of license. The requirement for fonts to remain under this license does not apply to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+“Font Software” refers to the set of files released by the Copyright Holder(s) under this license and clearly marked as such. This may include source files, build scripts and documentation.
+
+“Reserved Font Name” refers to any names specified as such after the copyright statement(s).
+
+“Original Version” refers to the collection of Font Software components as distributed by the Copyright Holder(s).
+
+“Modified Version” refers to any derivative made by adding to, deleting, or substituting—in part or in whole—any of the components of the Original Version, by changing formats or by porting the Font Software to a new environment.
+
+“Author” refers to any designer, engineer, programmer, technical writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining a copy of the Font Software, to use, study, copy, merge, embed, modify, redistribute, and sell modified and unmodified copies of the Font Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components, in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled, redistributed and/or sold with any software, provided that each copy contains the above copyright notice and this license. These can be included either as stand-alone text files, human-readable headers or in the appropriate machine-readable metadata fields within text or binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font Name(s) unless explicit written permission is granted by the corresponding Copyright Holder. This restriction only applies to the primary font name as presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font Software shall not be used to promote, endorse or advertise any Modified Version, except to acknowledge the contribution(s) of the Copyright Holder(s) and the Author(s) or with their explicit written permission.
+
+5) The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER DEALINGS IN THE FONT SOFTWARE.
\ No newline at end of file