Remove 1.9.3 target. Will probably be added lated.
Add test coverage badge to README.
Models and Sign-in page added.
"Changed user.rb to match style guide."
New user model and role model.
Added abilities.rb, and role migrations
Update dependencies.
Update dependencies
Role model, role migrations added
Abilities defined. CanCan Exception handling added
Users controller
Sign in and Sign up views
User model test suite
Update dependencies
Teacher and Student models added.
Merge branch 'user-models-tony'

Conflicts:
	Gemfile
	Gemfile.lock
Run database migrations and update Gemfile.lock.
Removed User model
Made formatting a bit more consistent.
Remove legacy user views.