Homestyx hydra

R1:284ee03919b3

Show refs in Diffusion for Git commits

Summary: In Diffusion, for Git, show commit refs (like "origin/master, origin/HEAD").

Test Plan: Looked at several Git, Hg and SVN commits.

Reviewers: davidreuss, btrahan, vrana, jungejason

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1130

Differential Revision: https://secure.phabricator.com/D2311
Repository: R1 hydra
Commit Date: Apr 25 2012