Changes to Pre, social, div names, and featuredbox

-  featured box switched to use bootstrap's thumbnails.
-  Pre font made smaller
-  changed name of sidebar divs
-  removed facebook for now
various changes to pre, div names, and switching to thumbnails

-  featured box switched to use bootstrap's thumbnails.
-  Pre font made smaller
-  changed name of sidebar divs
-  removed facebook for now