Started implementing support for facebook login. Logout not working yet, neither is the redirect-url on login. A check should be made in the logout procedure, checking wether the user is logged in via NTNUI or facebook.
Fixed redirection url for facebook login
Urlencode auth next param.

Also fix a small bug in settings, not passing backends as a tuple.
Merge pull request #13 from TelemarkAlpint/facebook-login

LGTM, great work.