Set up app for Coveralls.
Don't build ruby-head on Travis. For some reason bundler is not being installed.
Remove methods that were being overrided in ApplicationPolicy.
Check if we can update? in edit? policies.
Add Google Analytics tracking.
Put add course partial inline.
Use symbols instead of strings for modal ids.
Add favicon.
Remove unused course_params method from StudentsController.
Merge pull request #121 from graspapp/changes

Project stage #2.
Merge pull request #124 from graspapp/changes

Minor/"Trivial" changes to the concept edit page.
Temporarily remove leave course button.
Merge branch 'changes'

Conflicts:
	Gemfile
	Gemfile.lock
Update Gems
Remove leave button spec. Thought this was done already.
Install yaml_db to dump and load database saves.
Fix rails 4.0 issue with yaml_db.