Torrent creator should be smarter about setting tracker tiers

Another problem is that qBittorrent fails to understaind structure of multitracker torrents created by uTorrent. If you give qBT a .torrent with structure mentioned above, it will try to connect http://tracker.com/announce1 and http://tracker.com/announce2, and say "http://tracker2.com/announce1 not contacted yet". But it should instead connect http://tracker.com/announce1 and http://tracker2.com/announce1 at the same time, and if http://tracker.com/announce1 fails, then try http://tracker.com/announce2.

Yes, this needs to be looked at. However, I'm on vacation right now so this will have to wait until I come back, unless someone else wants to take lead of this *HINT* :)

Check the multi-tracker specification:
http://www.bittornado.com/docs/multitracker-spec.txt

It does not matter what uTorrent does, the specification says:

d['announce-list'] = [ [ tracker1, tracker2 ], [backup1] ]
  The first tier, consisting of tracker1 and tracker2, is shuffled.
  Both trackers 1 and 2 will be tried on each announce (though perhaps
  in varying order) before the client tries to reach backup1.

Also, I don't think making any guesses about the trackers tiers in the torrent creator is a good idea. I should instead add a way to define the tiers explicitly.