[feature/oauth] Most of ucp page related to login option should be done now

PHPBB3-11673
[feature/oauth] Start work on linking an oauth account

Updates token storage to allow retrieval only by session_id

PHPBB3-11673
[feature/oauth] Add tests for the new token methods

PHPBB3-11673
[feature/oauth] Worked in at least one test

PHPBB3-11673
[feature/oauth] Works in all tests now

PHPBB3-11673
[feature/oauth] Update the OAuth service interface

PHPBB3-11673
[feature/oauth] Update the auth interface

PHPBB3-11673