commID return for broadcast/unicast wifi interface

src/de/tudarmstadt/maki/simonstrator/api/uavsupport/communication/WiFiInterface.java

@@ -15,7 +15,7 @@ public interface WiFiInterface {
 
 	public NetInterfaceName getNetInterfaceName();
 
-	public void sendBroadcast(OverlayMessage message);
+	public int sendBroadcast(OverlayMessage message);
 
-	public void sendUnicast(OverlayMessage message, OverlayContact receiver);
+	public int sendUnicast(OverlayMessage message, OverlayContact receiver);
 }