Upgraded Twitter Bootstrap to 2.3.1
Added error popover for prereq errors in skillEditor
Bug fix for error popovers in skillEditor
Added missing view change (skillEditor)
Bugfix: skillEditor now properly clears listing when skill is deleted
Changed cursor style for some buttons in skillEditor
Added some visual cues to skillEditor
Merge branch 'skill_editor' of github.com:tsauvine/o4 into skill_editor

Conflicts:
	app/views/curriculums/courses/edit_prereqs.html.erb