Summary:
Ref T8493. Add Spaces support to Pholio.
This is straightforward; Pholio has no clone/copy/fork or weird parent/child stuff going on.
Test Plan: Created a mock, put it in a space, looked at it as another user, searched for stuff in spaces, viewed Macros.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T8493
Differential Revision: https://secure.phabricator.com/D13231
