Streamlining the application chrome

Ticket to supersede #45 (closed) and #42 (closed) :) The current plan is as follows:

• Reduce header size to just nav bar when user is logged in, to increase available screen space
• Add Aura/Dashboard logo to header
• Header: Update to AURA Logo
• Match the background color of the header/footer to the primary logo colors
• Remove the title "autoradio / Dashboard" from header since it is stated in the footer as well
• Update the text in the footer
• Replace favicon in tab