Policy, Status in PHUIHeaderView

Summary: The adds the ability to set 'properties' such as state, privacy, due date to the header of objects.

Test Plan: Implemented in Paste, Pholio. Tested various states.

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: Korvin, aran

Differential Revision: https://secure.phabricator.com/D7016