Change specification of im2col_nd
Change specification of im2col_nd

keisuke-umezawa/chainer,hvy/chainer,tkerola/chainer,wkentaro/chainer,ktnyt/chainer,keisuke-umezawa/chainer,niboshi/chainer,hvy/chainer,okuta/chainer,ktnyt/chainer,jnishi/chainer,chainer/chainer,ronekko/chainer,okuta/chainer,ktnyt/chainer,niboshi/chainer,anaruse/chainer,rezoo/chainer,wkentaro/chainer,pfnet/chainer,niboshi/chainer,keisuke-umezawa/chainer,chainer/chainer,ktnyt/chainer,okuta/chainer,niboshi/chainer,jnishi/chainer,keisuke-umezawa/chainer,jnishi/chainer,wkentaro/chainer,chainer/chainer,hvy/chainer,jnishi/chainer,wkentaro/chainer,hvy/chainer,chainer/chainer,okuta/chainer