Blocky v2.0.0

There have been a number of improvements made to Blocky between v1.0 and this new release. They include:

• Search
  • Reverse Futility Pruning
  • Internal Iterative Reductions
  • Late Move Pruning
• Evaluation
  • Piece Evaluation
    • Mobility (Rook, Bishop, Knight)
    • Bishop Pair
  • Pawn Evaluation
    • Passed Pawns
    • Doubled Pawns
    • Chained Pawns
    • Phalanx Pawns
• Move Ordering
  • Butterfly History Heuristic

Additionally, there were some major speedups, and existing features have been tweaked.

Results against Blocky v1.0 at time control 40s + 0.4s:

Score of Blockyv2.0.0 vs Blockyv1.0: 831 - 45 - 124  [0.893] 1000
...      Blockyv2.0.0 playing White: 431 - 18 - 51  [0.913] 500
...      Blockyv2.0.0 playing Black: 400 - 27 - 73  [0.873] 500
...      White vs Black: 458 - 418 - 124  [0.520] 1000
Elo difference: 368.6 +/- 28.8, LOS: 100.0 %, DrawRatio: 12.4 %

Testing was done using Stockfish's 8movesv3 book.