added omniauth gems
spec for creating an account / login
Merge remote-tracking branch 'origin/master' into gawaine/google_oauth2
user model
spring cleaning
Merge remote-tracking branch 'origin/master' into gawaine/google_oauth2

Conflicts:
	Gemfile.lock
User#change_karma_by specs
User#update_auth_token specs
Merge pull request #5 from mikamai/gawaine/google_oauth2

Switched to google oauth2