Summary:
This adds FontAwesome and attempts to make use as icons as consistent as possible. May require additional tweaks once we start using, but in practice this is pretty finished.
- Adds FontAwesome
- Adds additional transforms (rotates, spins)
- Adds additional colors
- Better scopes halflings and fontawesome
- Shares CSS between fonts for consistency
Test Plan:
Tested various browsers back to IE8, mobile.
{F146146}
Reviewers: btrahan, epriestley
Reviewed By: epriestley
Subscribers: epriestley, Korvin
Differential Revision: https://secure.phabricator.com/D8818
