R1:d9f01d6fb7f5

[Rough Sketch] Differential ObjectItemView Smexyness

Summary:
Tried out `PhabricatorObjectItemView` for Differential. It looks smexy and smooth.

Refs T2014

- Title and Date as Maniphest
- Author in the handle icon
- Bar color reflects revision status (Needs Review, Accepted, Abandoned etc.) @chad looking for non-blue is faster than keeping watch for everything that's not "Closed" in old table form
- Some status information are in footer icons; currently only stale/old status display as well as saved…