Retire move.h

Also some assorted comments fixes and other trivia.

No functional change.

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

src/book.cpp

@@ -28,6 +28,7 @@
 #include <iostream>
 
 #include "book.h"
+#include "misc.h"
 #include "movegen.h"
 
 using namespace std;