[WIP] Console

* [x] Add `/console` websocket endpoint
* [x] Add console UI on /index.html
* [ ] Add some authentication process to `/console`
* [x] `Connection` event;
* [x] `Disconnection` event;
* [x] `Subscribed` event;
* [ ] `Unsubscribed` event;
* [ ] `Vacated` event;
* [ ] `Occupied` event;
* [ ] `API message` event;


Preview:

![screen shot 2014-04-10 at 10 51 19 pm](https://cloud.githubusercontent.com/assets/30873/2666488/42074582-c09e-11e3-9019-960081da44a0.png)