Add official stamp

Author: robmadole

README.md

@@ -1,3 +1,7 @@
+<a href="https://fontawesome.com">
+ <img align="right" width="100" height="100" alt="Official Javascript Component" src="https://img.fortawesome.com/349cfdf6/official-javascript-component.svg">
+</a>
+
 # angular-fontawesome
 
 [![npm](https://img.shields.io/npm/v/@fortawesome/angular-fontawesome.svg?style=flat-square)](https://www.npmjs.com/package/@fortawesome/angular-fontawesome)