Rewrite king danger of pieces in hand

Rewrite king danger of pieces in hand

Evaluate pieces in hand analogously to pieces on the board.

crazyhouse STC
LLR: 2.97 (-2.94,2.94) [0.00,10.00]
Total: 1774 W: 936 L: 809 D: 29
http://35.161.250.236:6543/tests/view/5c2382e16e23db2472895629

crazyhouse LTC
LLR: 2.94 (-2.94,2.94) [0.00,10.00]
Total: 1041 W: 572 L: 456 D: 13
http://35.161.250.236:6543/tests/view/5c239b2c6e23db247289562c

minishogi
LLR: 2.98 (-2.94,2.94) [0.00,10.00]
Total: 526 W: 303 L: 197 D: 26

shogi
LLR: 3.02 (-2.94,2.94) [-10.00,5.00]
Total: 1812 W: 892 L: 838 D: 82