Readme Android Setup (no WebSockets)

I had no idea, but it would appear that maybe Android doesn't support WebSockets ???

I'll poke around a bit more and perhaps add this to my install instructions:

Options:

```
https://github.com/mkuklis/phonegap-websocket
https://github.com/knowledgecode/WebSocket-for-Android
```

Thanks @boazhoch for the information on Issue #6 
