Async transfer should be from numpy
Async transfer should be from numpy

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