weiss 0.7

Over the last 3 weeks weiss has gained around 175 elo:

10+0.1
Score of weiss 0.7 vs weiss 0.6: +230 -43 =127 [0.734]
Elo difference: 176.10 +/- 29.76

Major changes in v0.7:

• Dynamic delta margin #84
• Smaller aspiration window #86
• Movegen code is readable and 1/3 the length #93
• Tuned evaluation values #95 #96 (still a lot more to be gained from this)
• Various speedups #98 #99
• Pruning:
  • Razoring #102
  • Futility #103
  • Late Move #104
• Move ordering:
  • Underpromotion delayed #100
  • History ignores promotions #101
  • Avoid doubled killers #105
  • Include moves that cause beta cutoffs in history #106

Overall evaluation is still very basic, while the search has gotten better.