FortAwesome/Font-Awesome — pull request #5150 by JonMidhir (2014-12-07 15:52:14+00:00)
Title: Rename Gittip to Gratipay, retaining alias

Fix for https://github.com/FortAwesome/Font-Awesome/issues/4307.

Renames the Gittip icon to Gratipay. Keeps the original `.fa-gittip` class as an alias in order not to break existing apps.