R1:59f3b5125d5a

Add authorPHID to Dashboards

Summary: Adds an authorPHIDs, populates olds ones.

Test Plan: Make a new Dashboard, see that I created it.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17022