Support buffer interface for memoryview
Support buffer interface for memoryview

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