Crystal v4.0

This update encompasses many changes from both upstream and original work. Effort has been put into narrowing the tree without sacrificing tactical ability, thus improving scaling. While it should remain a fair bit weaker than default Stockfish, the relative Elo gap has hopefully been lessened and general strength improved.

Bench: 5405822

Additional compiles by IpMan may be found at: http://ipmanchess.yolasite.com/compiles.php