FontAwesome Icons in Message User Info for Xenforo 2.2

This is something I have managed to implement. It may not be the best way to achieve it, and if there is a better way, please reply to the thread and I will update it.
It works in XF 2.2, but may work in 2.x, I don't know.
It includes how to implement fontawesome icons for custom user fields. I have a custom user field represented by a car...