Complete example for worker code

I've been struggling to get a simple demo of the code working using your repository and there is one import detail missing in the description.

In the code for the Worker the message handler needs to be set.

@Override
public void onWorkerLoad() {
	setOnMessage(this);
}

I've created a simple project with a very simple client/Worker at https://github.com/RichardMorris/SimpleGWTWebWorker