Example of using socket.io for multi-user real-time web

To try it:

1. Start server: node spikes/socket.io/app.js
2. Open multiple client tabs in a browser: http://localhost:8080
3. Look at server and client consoles

Also:

• client-race.js demonstrates a race condition in the socket.io client. It was exposed by our attempt to test socket.io. The issue was fixed in v1.4.5. It was reported here: socketio/socket.io-client#935

• server-hang.js and server-hang.html demonstrates a bug in the socket.io server that prevents the server process from exiting. The issue was reported here: socketio/socket.io#1602