lots of visual tweaks to main page.

adding AjaxControlToolkit which might be helpful in getting file upload working.
Merge branch 'master' of https://github.com/jschefter/UniversityChat

Conflicts:
	UniversityChat-SignalR-vs2010/UniversityChat/Content/site.css
	UniversityChat-SignalR-vs2010/UniversityChat/Site.Master