PlayerTrackView

Merge pull request #1 from cbartoldus/master

Added skip mute and more buttons.

4th commit of PlayerTrackView, added manual test for text constraint resizing between song title and artist name//reason added(for keyboard player). Separated PlayerTrackView UI into two components: PlayerTrackView(progress bar and timers), and PlayerTrackViewText(song title, artist name, reason added), to be placed into player view.

3rd commit, successful UI test integration into PlayerTrackView

Second commit of PlayerTrackView, added test text fields and XC UI testing