Adopt to XCode 6 Beta 5

* Can't implicitly check for absent on aptionals ;-(
* Protocol constructors have to be 'required'

Change-Id: I72d8fa8ee3b626edf2ed45624fe14fff59e8cab1
Replace MediaPlayer with AVPlayer

This also fixes the movie load bug

Change-Id: I6a5213c794e9dceaae94525f023d0ac000252fe5
Remove bug fix

Seems to be fixed in XCode 6 beta 5

Change-Id: Id8589267abe49559e3a19b41baf0fd1158657154
Move player resizing to viewDidAppear and use KVO

Change-Id: I7dd5fb038f2a684183a730f1075317ffbdf072a8
Clean up movie player key lookup

Only KVO is required for now to get the movie size.

Change-Id: Ifd8cc1c7bb7485dff462ca30f68f05ae02d9e98e