Torrent management: Process finished torrents

Here's where we have the most fun. rtorrent has done all the work for us to grab our torrents, moving completed files into [download/torrents/finished]. Now we'll write some script magic to organize our downloads, without interrupting rtorrent seeding.

Let's review our directory layout:

download/torrents/   actively downloading torrents and files
  finished/          files that have finished downloading
  archived/          actively seeding torrents of archived files
    symlinks/        symlinks to files that have been archived
    offline/         offline torrents - move back to archived to auto-restart

We already have the first two directories working. Here's the next goal: move finished files to the proper location, according to the content. IMHO, if you are a reasonably sane person, you don't want all your media jammed into one directory. You want to keep your media organized, preferrably in a central location on the network. So let's get organized! We'll use some regex magic - don't worry, it's not too hard.