Redirects through the login process if the user hits a page that requires authentication

Also removes the ability to self register through github. We will need to create the user with Github uid so they can authenticate
Merge branch 'master' of github.com:jnf/blinder into pks/auto_signin_before_filter

Conflicts:
	app/views/layouts/application.html.haml
Updating user record at signin
providing a way to sign out :)
Merge pull request #17 from ninjapanzer/pks/auto_signin_before_filter

Redirects through the login process if the user hits a page that require...