Adds support to channel model and processing manager to auto-start

channels upon loading the playlist.  

Processing manager now detects channel configuration changes and
restarts the channel if it is currently processing.

Channel editor enable button now shows green if it is processing, or
default when not processing.

src/controller/channel/ChannelProcessingManager.java

@@ -140,6 +140,13 @@ public class ChannelProcessingManager implements ChannelEventListener
 					stopProcessing( channel, true );
 				}
 				break;
+			case NOTIFICATION_CONFIGURATION_CHANGE:
+				if( isProcessing( channel ) )
+				{
+					stopProcessing( channel, false );
+					startProcessing( channel );
+				}
+				break;
 			default:
 				break;
 		}