Starting the server as a daemon

Since the last pull request we've been working and building an application on top of this skelleton and when we were deploying it to the real server we discovered that, when we start the server as a daemon, the Django application was not being served (but Twisted was listening anyway).

So we added the MultiService and right now it's possible to start the entire server with Django as a daemon  working like a charm with:

```
$ twistd -y server.py
```
Cheers!