1.8

• generation of pseudo-legal moves (no elo gain but cleaner code)
• refactored move generation class
• search
  • implemented late move pruning
  • updated pruning margins (same as Laser)
  • removed matethreat
• evaluation
  • removed non significant terms
  • added space evaluation
  • use a material hash
  • imbalances using # of pieces
  • use full key when validating eval, pawn, material hash hit