refreshing Font Awesome, Ember, Require, and LESS

Updated files for the following frameworks and libraries:

* Ember.js 1.7.0 -> 1.71
* Font Awesome 4.1.0 -> 4.2.0
* LESS 1.7.4 -> 1.7.5
* RequireJS 2.1.14 -> 2.1.15