Yes, I found out how to use it.
Settings > Advanced > Code Injection
Paste this code on the Code Injection page under HEADER:
<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet">`
Now you have installed Font Awesome on your site. You can now insert code (using a Code Block) on any of your pages to reference and use any of their icons (http://fortawesome.github.io/Font-Awesome/icons/)
Example of individual code to insert in a Code Block for an icon:
<i class="fa fa-envelope-o"></i>
fa-envelope-o
Hope this helps!
