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

src/aphront/configuration/AphrontDefaultApplicationConfiguration.php

@@ -61,7 +61,7 @@ class AphrontDefaultApplicationConfiguration
         '(?:(?P<mtime>[0-9]+)T/)?'.
         '(?P<library>[^/]+)/'.
         '(?P<hash>[a-f0-9]{8})/'.
-        '(?P<path>.+\.(?:css|js|jpg|png|swf|gif))'
+        '(?P<path>.+\.(?:css|js|jpg|png|swf|gif|woff))'
           => 'CelerityPhabricatorResourceController',
       ),
     );