Load Font-Awesome from a CDN.
If you want to include Font Awesome in your build, use the official Font Awesome package.
if you are using the browser-policy package, you'll need to add this line to a file in your /server/ directory to allow the browser to load from the cdn
BrowserPolicy.content.allowOriginForAll('*.bootstrapcdn.com');
Be aware of the class name changes, what's new in Font Awesome and upgrading from v3 to v4