The Player is not longer public in PlayerService.
Added a bunch of methods in PlayerService to front the IPlayer class.

Related to issue #396.
iOS: Changed the way the view controllers report that the view is ready (after ViewDidLoad instead of ViewWillAppear).
Added PlayerPlaylistIndexChangedMessage.

Related to issue #405.
iOS: Customized UINavigationController with new look and back button functionality.
iOS: Added album art to list of songs in Mobile Library Browser.
iOS: Added icons and new fonts.

Related to issue #405 and issue #408.