Support WOFF files in Celerity and add Source Sans Pro

Summary:
  - Allow Celerity to map and serve WOFF files.
  - Add Source Sans Pro, Source Sans Pro Bold, and the corresponding LICENSE.
  - Add a `font-source-sans-pro` resource for the font.

Test Plan:
  - Changed body `font-face` to `'Source Sans Pro'`.
  - Added `require_celerity_resource('font-source-sans-pro')` in StandardPageView.

Works in Firefox/Chrome/Safari, at least:

{F123296}

{F123297}

{F123298}

Reviewers: btrahan, chad

Reviewed By: chad

CC: chad, aran

Differential Revision: https://secure.phabricator.com/D8430
Allow parenthesis in author name

Summary: We have a dozen users who has `(...)` in their 'real name', like 'Jimmy (He) Zhang', and it's causing the diffusion file browser problems when blame is enabled. The parser does not expect those parenthesis and the lines of code will be empty if they were last touched by a user like that.

Test Plan: Try it

Reviewers: wez, lifeihuang, JoelB, #blessed_reviewers, epriestley

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D8429