Added MediaPlayer code port
* Leverage ajax-fetch.wb WET ajax method with caching to minimize redundant http calls
* Used TB3.0 Progress bars with aria states
* Minized WET 3.1 CSS leveraging tranistions and events from WET 4.0
* Started hooks with new YouTube api chromeless player
* Added Progress element back into media player
* Corrected some vague variables

TODO: Captioning code port