Initial implementation of the event-based notification system's infrastructure.
Merge branch 'master' into issue230
Implementing a user interface in admin to subscribe/unsubscribe to notifications
Adding missing processing for other events
start creating tabbed document page
having weird styling issues with the tab nav :focus
style tweak for document page tab
Merge branch 'master' into issue378

Conflicts:
	public/css/style.css
Change second tab to Discussion
toc styling
Merge branch 'master' into issue230

Conflicts:
	app/controllers/DocumentApiController.php
add some basic styling
change OpenGovEvent to MadisonEvent
finish new user signup notification
finish doc_edited notification.  working on doc_commented
Tabbed layout
finish comment notifications
finish group request verifications
Merge branch 'master' into issue230
add creatAdmin to functional helper