Add new super hero header for Phame Blog

Summary: Adds a new header layout for Phame Blog. Subtitles now also.

Test Plan:
With Image, With Subtitle, Without Image, Without Subtitle. Mobile, Tablet, Desktop.

{F1691506}

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D16147