Separate "PhabricatorBarePageView" out of "PhabricatorStandardPageView"
Summary:
For Phame, we really want more than a chromeless page -- it shouldn't have Javelin or Phabricator styles on it.
Pull the bare infrastructure out of StandardPageView and make it available as BarePageView.
Test Plan: Viewed bare page in UIExamples, various non-bare pages.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Differential Revision: https://secure.phabricator.com/D3711