added backbone-forms
login validation, but not using backbone-forms yet
login form validations; fixed errors display
fixed signup; login after successful signup
Merge branch 'develop' into feature/login-bbf

Conflicts:
	Gruntfile.coffee
	src/koemei/coffee/koemei.coffee
	src/koemei/coffee/model/user.coffee
	src/koemei/coffee/view/overlays/login.coffee