Fixes to the message keys

-Moved the <h2> tags to the code.
-Renamed the pagedisqus-before key to pagedisqus-title.
-Removed the pagedisqus-after key.
-Added the pagedisqus-noscript and pagedisqus-shortname keys.
-Added the qqq messages for all the keys.

Change-Id: Ieda221da1eefa416993bef16ca6bb83649af3c11