Error 400
http://socketo.me/docs/hello-world

I testing (good work):

```
Running It ¶
Complete, let's run it and test it. Open up three terminal windows, typing:

$ php bin/chat-server.php
$ telnet localhost 8080
$ telnet localhost 8080
In each of the telnet windows, type a message ("Hello World!") and see it appear in the other!
```

I try (not working)

```
var conn = new WebSocket('ws://localhost:8080');
conn.onopen = function(e) {
    console.log("Connection established!");
};

conn.onmessage = function(e) {
    console.log(e.data);
};
```

`WebSocket connection to 'ws://localhost:8080/' failed: Error during WebSocket handshake: Unexpected response code: 400`

Why not worked?
