Summary: Created PhabricatorExternalAccount class with only data members. Will discuss with you regarding the necessary functions to be implemented in this class. Sql Patch to create a new table for external_accounts. Will I have to write unit tests the new storage object? Sending you this diff so that you can comment on this to further improve :).
Test Plan: {F40977}
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, Korvin, AnhNhan
Maniphest Tasks: T1536, T1205
Differential Revision: https://secure.phabricator.com/D5724
