Retire move.h

Also some assorted comments fixes and other trivia.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

src/movegen.h

@@ -20,7 +20,7 @@
 #if !defined(MOVEGEN_H_INCLUDED)
 #define MOVEGEN_H_INCLUDED
 
-#include "move.h"
+#include "types.h"
 
 enum MoveType {
   MV_CAPTURE,
@@ -32,6 +32,8 @@ enum MoveType {
   MV_LEGAL
 };
 
+class Position;
+
 template<MoveType>
 MoveStack* generate(const Position& pos, MoveStack* mlist);