Weiss 1.2

Since version 1.1 released a few weeks ago Weiss has gained about 120 self-play elo:

10+0.1
+4705 -1169 =4174
Elo difference: 127.73 +- 5.28

60+0.6
+4463 -918 =4955
Elo difference: 124.19 +- 4.84

Major changes:

Tuning (eval and search)
Improved makefile
Static Exchange Evaluation for move ordering
Singular Extension
Improvements to history and LMR
Can limit NoobBook to x moves
Supports 'go mate x'