Working commandline downloads and removing unused code

Removed all unused code; some of which now resides in bittorrent-client and some of which was for the http version of the interface and should be readded only once its functional.

Also cleaned up logging (spread across PRs for bittorrent-swarm and bittorrent-client) and got the peerflix-based commandline working.  Downloading a single torrent from the commandline now provides a nice chalk-based interface which is handy for telling what's actually going on under the hood.