New formula for quiet move scoring: 3 * cmh + 1 * hist

STC

LLR: 2.97 (-2.94,2.94) [-1.50,4.50]
Total: 45363 W: 8759 L: 8532 D: 28072

LTC

LLR: 3.51 (-2.94,2.94) [0.00,4.00]
Total: 125092 W: 20032 L: 19468 D: 85592

Bench: 7058819

Resolves #328

src/movepick.cpp

@@ -167,7 +167,7 @@ void MovePicker::score<QUIETS>() {
 
   for (auto& m : *this)
       m.value =  history[pos.moved_piece(m)][to_sq(m)]
-               + cmh[pos.moved_piece(m)][to_sq(m)];
+               + cmh[pos.moved_piece(m)][to_sq(m)] * 3;
 }
 
 template<>