update requirements
update requirements

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