SPSA tune search, king safety, and history update

[TerjeKir]

STC 80k vs master Elo | 9.96 +- 3.47 (95%) Conf | 8.0+0.08s Threads=1 Hash=32MB Games | N: 20000 W: 5506 L: 4933 D: 9561 Penta | [263, 2248, 4501, 2629, 359] http://chess.grantnet.us/test/34247/

LTC 38k vs master Elo | 7.29 +- 4.71 (95%) SPRT | 40.0+0.40s Threads=1 Hash=128MB LLR | 2.89 (-2.25, 2.89) [0.00, 3.00] Games | N: 9770 W: 2393 L: 2188 D: 5189 Penta | [52, 1107, 2392, 1252, 82] http://chess.grantnet.us/test/34217/

LTC 80k vs 38k Elo | 3.02 +- 2.73 (95%) SPRT | 40.0+0.40s Threads=1 Hash=128MB LLR | 2.90 (-2.25, 2.89) [0.00, 3.00] Games | N: 29264 W: 7003 L: 6749 D: 15512 Penta | [192, 3480, 7077, 3648, 235] http://chess.grantnet.us/test/34244/

Bench: 21740192