add Facebook icon

Squashed commit of the following:

commit 8283736bb4ca9ba804952ff5e0d9a384a9d4a612
Author: Andrew Minion <andrew@andrewrminion.com>
Date:   Thu Sep 25 08:57:33 2014 -0400

    add facebook icon using existing job-manager SVG font

commit bce16f6f259059379d342a199c461bbc7bd9003c
Author: Andrew Minion <andrew@andrewrminion.com>
Date:   Wed Sep 24 17:08:39 2014 -0400

    update link to theme templates folder

commit 41390d383efc711adc7fcd28b40b021947b39fc4
Author: Andrew Minion <andrew@andrewrminion.com>
Date:   Wed Sep 24 16:54:42 2014 -0400

    update GitHub url

commit 569501f51e1ac1235f918b46dc34920c2ec80917
Author: Andrew Minion <andrew@andrewrminion.com>
Date:   Wed Sep 24 16:52:31 2014 -0400

    update function names