cleaning up overview.css
	- removed css classes that weren't being used
	- removed !important from css
	- changed px to ems
	- removed (as much as possible) doc references
linked in cdn version of bootstrap css (to improve performance)
aligned font icons in activity summary stats
more cleanup to css
	- replace px with ems in navbar section
	- cleanup to discussion/thread section
replacing font awesome with fontello
	- replaces image emoticons with font icons
	- adding font files