Changes

| Added tests for Popcorn[https://github.com/mjschranz/popcorn-js Facebook Plugin <br/> and refactored it's code.| tree/t734d/plugins/facebook Ticket #734] [https://github.com/mjschranz/popcorn-js/tree/t734d/plugins/facebook Ticket #734733]| Added tests for Popcorn.js Facebook Plugin and refactored it's code.