Split models.py up about dipvis

[UEWBot]

Commit 46981f5 splits game scoring out.
Commit ec61a82 splits out items 1 and 2 from the list above.
File sizes are now:
$ wc tournament/*.py
113 379 3718 tournament/admin.py
427 1748 17768 tournament/background.py
103 407 3419 tournament/diplomacy.py
251 1143 9663 tournament/game_scoring.py
0 0 0 tournament/init.py
1345 5431 60720 tournament/models.py
596 2193 28952 tournament/players.py
1366 3649 59415 tournament/tests.py
88 384 5114 tournament/urls.py
1206 4550 56160 tournament/views.py

[UEWBot]

Models.py keeps growing (as does views.py):
133 437 4582 admin.py
447 1859 18804 background.py
154 590 5232 diplomacy.py
246 1111 9289 game_scoring.py
362 1819 15516 game_seeder.py
0 0 0 init.py
1960 7688 86538 models.py
756 2672 33260 players.py
62 223 2234 test_background.py
79 227 2767 test_diplomacy.py
299 1076 13603 test_game_scoring.py
423 1314 15260 test_game_seeder.py
2336 6043 101427 test_models.py
198 566 7906 test_players.py
131 482 7169 urls.py
2216 8225 100850 views.py
It's fairly straight-forward to split out TournamentPlayer, SeederBias, and Preference into a separate file, but that's only 160-odd lines. The rest of the classes have a lot of inter-dependencies.
Of course it should be trivial to split views.py up, but that's somewhat tangential to this bug (and I'd want views tests first, to ensure no breakage).

[UEWBot]

Looking at views.py, there are very few inter-dependencies. One obvious way to split it is as follows (with rough line counts):

tournament 722
round 540
game 751
player 14
WDD 186
that would be with the functions and related classes in the same file.

[UEWBot]

I'm going to go ahead and close this one. A lot of the code has already been split up into many files, and there's work underway to split those files even further.