Lesspartial

This is a simplification that totally remove partial reductions so I ask to commit it.

It also got good results
At short time control with a test of 20000 games
ELO: 4.05 +-3.2 (95%) LOS: 99.4%
Total: 18942 W: 4031 L: 3810 D: 11101 and result is not going to change much.

At long time control passed SPRT(-1,3) convincingly and the result seem to be also good enough to pass SPRT(0,6)

I have problem in rewriting the patch to get rid of ONE_PLY but I can give a new version with the same 
bench that use ONE_PLY in clearly less cases if it can help you when I converted part of the formula to keep the same bench and search get int and not depth as a parameter.

LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 7647 W: 1356 L: 1214 D: 5077