Added some automation for css/less and javascript files. Cleaned up
source code with beautifier. Remove jQuery duplication since it was
loaded twice in this page. Removed eclipse.org-common. Moved js files
at the bottom of the page for faster loading. Updated solstice html.

Change-Id: If74222d506b66d6514af6977383e4fd32fdda220
Signed-off-by: Christopher Guindon <chris.guindon@eclipse.org>