start next track on track complete notification.
set up cache array for tracks from libsyn
switched from BRTrack to FJTrack. switched to AVPlayer for audio playback.
set up tracks array.
adjust contents size of scroll view to make room for audio controls panel
nil out network op when request returns.
removed unnecessary methods.
don't hide loading indicator if network operation is active.
removed unused view controllers.
commented out navigate to section method of app delegate.
support portrait only
added share method to delegate protocol. added sharing button to view.
set up audioControlShare method stub.
implemented btnShareAction method
implemented email sharing.
pause audio player on seek. resume when player item is ready.
implemented tweet sharing functionality.
removed commented out code.
nil out network op on callback method.
register for audio player ready notification, show audio controls when audio starts.