Upgraded install info to Python 3.6 and fixed missing installation canditate for mysql-client

README.rst

@@ -24,12 +24,13 @@ In Debian or Ubuntu (or derivatives) you should be able to achieve this with thi
 
 Using PostgreSQL:
 
-    $ sudo apt-get install postgresql postgresql-contrib libjpeg-dev python3.5-dev virtualenv
+    $ sudo apt-get install postgresql postgresql-contrib libjpeg-dev python3.6 virtualenv
 
 
 Using MySQL:
 
-    $ sudo apt-get install libmysqlclient-dev libjpeg-dev python3.5-dev virtualenv
+    $ sudo apt-get install default-libmysqlclient-dev libjpeg-dev python3.6 virtualenv
+
 
 Setting up the environment
 --------------------------