title: how to properly inject Facebook JavaScript SDK to AngularJS controllers?
body: <p>I'm new to AnuglarJS and already built a small web-app with it,
  I would like to use the Facebook JavaScript SDK with it, but using best practices (dependency injecting to controllers, to maintain app structure and testability).</p>
  
  <p>I found this <a href="https://groups.google.com/forum/#!msg/angular/bAVx58yJyLE/Kz56Rw-cQREJ">https://groups.google.com/forum/#!msg/angular/bAVx58yJyLE/Kz56Rw-cQREJ</a>
  but its very confusing for someone new to this framework (modules, services and factories are not explained well IMHO).</p>
  
  <p>so, what is the proper way to use the Facebook SDK inside an AngularJS app ?</p>