add omniauth gem and input fb app credentials
add db schema, which was accidentally left out before
change login controller to sessions controller
facebook omniauth login almost works
fb login/logout now works. 0 styling though.

I also had to add "http://localhost:3000/" as a site url on our fb app's
settings.
Merge branch 'master' of github.com:pbirsinger/auto_hb

Conflicts:
	app/views/login/login.html.erb
	config/routes.rb
	db/schema.rb