Add a simple web interface

[Ianleeclark]

This can include statistics from #64

The next most important feature is to add a torrent to the list of acceptable torrents. The info_hash will be added to Redis (and a backup sent to the database, because Redis persistence is not being targeted), so if a peer requests an info_hash that is not in the Redis database, we can send a response stating that the torrent is not authorized for use on this tracker.