R1:99b839948cd4

Update look of Legalpad

Summary: Uses FontKit like Diviner, simplifies headers.

Test Plan:
Dropped in Contributor Doc, looks pretty.

{F170799}

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9751