Model relationship between users, courses, and bins.

Still needs validations.
Add remove_course and add_course to bin and user
Add controllers for user and user/courses
Merge branch 'bins' into bin_merge
Add debugger gem
Fix namespace collision between user model and api::user namespace

Moved Api::User to Api::Users
Fixed numerous login bugs
Merge branch 'bins' of github.com:everett1992/bear-ballings into bins
Merge branch 'bins'

Conflicts:
	app/views/main/login.erb
Renamed .erb's to .html.erb