update readme for stride and pooling size no longer need to match in SpatialMaxPooling
update readme for stride and pooling size no longer need to match in SpatialMaxPooling

hughperkins/clnn,szagoruyko/clnn,brunoro/clnn,brunoro/clnn,szagoruyko/clnn,szagoruyko/clnn,hughperkins/clnn,brunoro/clnn,hughperkins/clnn,szagoruyko/clnn,hughperkins/clnn,brunoro/clnn