PHUIFeedStoryView, Update Profile

Summary: This moves Feed's rendering over to a PHUI class. I want to build it out and have it power Ponder, Phame, Feed, as well as Profiles and Projects in some fashion. It also provides some more data depth over ObjectItemView. Also updated Profile for mobile and fixed some other display issues there.

Test Plan: Tested Feed, Profile. Used iOS and Chrome.

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: aran, Korvin, AnhNhan

Differential Revision: https://secure.phabricator.com/D5687