Installing twitter bootstrap, installing devise, and using postgresql for persistence.
Merge branch 'twitter_bootstrap'

Conflicts:
	Gemfile.lock
Adding models, controllers, and views to support custom notification rules. Work in progress.
Modeling follower relationships, and using them to determine recipients of a notification.
Putting raw functionality behind notifications list and notifications details pages.
Adding usage models, building out pages, improving navigation.
Adding api_key to user object, adding integration seed data, modifying commit controller to use api_key.
Adding git-client-side integration controller for downloading git hook shell scripts.
Rendering post-commit hook for git-client-side integration as plain text.