v2.3

https://github.com/jgilchrist/tcheran/blob/master/CHANGELOG.md#23

Elo   | 25.75 +- 9.23
Conf  | 8.0+0.08s Threads=1 Hash=16MB
Games | N: 4096 W: 1685 L: 1382 D: 1029
Penta | [207, 358, 735, 421, 327]

Elo   | 22.08 +- 8.85
Conf  | 60.0+0.60s Threads=1 Hash=128MB
Games | N: 4096 W: 1542 L: 1282 D: 1272
Penta | [145, 384, 837, 430, 252]