Use templetized operations for Square

This is tricky because there are some special
binary fnctions with SquareDelta that we should
leave as they are.

Also note that we needed to add Unary minus template
to fix a comile error in SERIALIZE_MOVES_D macro that was
triggered because now we don't allow conversion to int.

No fuctional change.

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