v2.1

https://github.com/jgilchrist/tcheran/blob/master/CHANGELOG.md#21

ELO   | 109.2 +/- 9.4
CONF  | 8+0.08 Threads=1 Hash=128MB
GAMES | N: 4096 W: 2142 L: 895 D: 1059

ELO   | 121.4 +/- 18.5
CONF  | 40+0.4 Threads=1 Hash=128MB
GAMES | N: 1024 W: 534 L: 190 D: 300

Huge thanks to @mvanthoor for the help discovering all three issues that were addressed in this release.