Update README.md

Added: 
* [5 AngularJS Antipatterns & Pitfalls] (http://nathanleclaire.com/blog/2014/04/19/5-angularjs-antipatterns-and-pitfalls/)
* [Animating AngularJS Apps: ngView] (http://scotch.io/tutorials/javascript/animating-angularjs-apps-ngview)
* [Improving ng-repeat Performance with “track by”] (http://www.codelord.net/2014/04/15/improving-ng-repeat-performance-with-track-by/)