add option to use hash for perft

[elcabesa]

• [x] write code
• [x] test 6+0.1
• [x] verify perft
• [x] write a adapter Perfthash using Hash interface?
• [x] add UCI options

test 6+0.1 Elo difference: 3.54 +/- 2.52 test 60+0.6 Elo difference: 0.00 +/- 5.18