Demos table - responsive and desktop
Should fix (or at least mostly) DEVELOPER-270

We may need to refine the projects used in each product, but the
ground work is done.

We're reusing what was done in the projects page to maintain
consistency.
Removed commented out code
Fixing events page sprites and spacing, resolves DEVELOPER-362
Fixing mobile layout errors that sprites introduced, resolves DEVELOPER-363
Merge branch 'master' of https://github.com/jboss-developer/www.jboss.org into DEVELOPER-367