Updated to use authorized_response approach
Merge pull request #221 from mdxs/upd_authorized

Updated to use authorized_response approach
Handle case in which email is None (as GitHub can provide)
Merge pull request #222 from mdxs/fix_create_user_db

Handle case in which email is None (as GitHub can provide)
Added  rel="nofollow" to order and filter links
Refactoring signin stuff
Merge pull request #223 from gmist/refactoring_signin

Refactoring signin stuff