[TIMOB-14541] iOS: AudioPlayer throws error with no internet connection when attempting to play a remote resource

Issue

AudioPlayer error events implementation. If you try to get some errors about audio streaming and it's not possible. When the application tries to play a remote resource and the connection is off, an error is fired and the dialog message is showed. ("Unable to configure network stream").

Use case

I need get the error event about this error, but this is not implemented yet, i propose create an event for get all errors. (Ex. error event).

var streamer = Ti.Media.createAudioPlayer();
streamer.url = "http://54house.stream-balancer.de/";
//Another way to force the issue "Unable to configure network stream" by giving another file, not sound. 
//streamer.url = "http://54house.stream-balancer.de/listen.pls";
streamer.addEventListener('change', function(e){
	Ti.API.info( 'Change: '+ JSON.stringify(e) );	
	if(e.state == 0){
		//back to initialized state
		//Handle it! 
	}
});
streamer.start();

Probably iOS error property would allow to find out receiver's status so the error could be described (read-only property) http://developer.apple.com/library/ios/documentation/AVFoundation/Reference/AVPlayer_Class/Reference/Reference.html#//apple_ref/occ/instp/AVPlayer/error