Add 'github-api' gem
Add omniauth find_or_create_by to session create
Remove deprecated session method
Add metho
remove helper methods for Oauth2 from application helper
Remove find or create method from session helper
Add login/logout for github as links
Rename env constants for github
Hard code github into route, only api
Remove now deprecated column migrations
update .ds store
Merge remote-tracking branch 'origin/master' into test_env

Conflicts:
	app/views/layouts/application.html.erb
Merge pull request #27 from alexung/github_omniauth

Github omniauth