The application source code is licensed under the Apache License, Version 2.0
The generated source code (Elements.generated.cs) was created from FontAwesome and fall under its license:
The Font Awesome webfont, CSS, and LESS files are licensed under CC BY 3.0. A mention of Font Awesome - http://fortawesome.github.com/Font-Awesome in human-readable source code is considered acceptable attribution (most common on the web). If human readable source code is not available to the end user, a mention in an 'About' or 'Credits' screen is considered acceptable (most common in desktop or mobile software).