Support cpu-only
Support cpu-only

wkentaro/chainer,cupy/cupy,niboshi/chainer,jnishi/chainer,hvy/chainer,delta2323/chainer,keisuke-umezawa/chainer,niboshi/chainer,keisuke-umezawa/chainer,keisuke-umezawa/chainer,cupy/cupy,chainer/chainer,tkerola/chainer,kikusu/chainer,kashif/chainer,cemoody/chainer,ktnyt/chainer,ktnyt/chainer,pfnet/chainer,hvy/chainer,okuta/chainer,anaruse/chainer,kikusu/chainer,okuta/chainer,cupy/cupy,hvy/chainer,chainer/chainer,jnishi/chainer,benob/chainer,niboshi/chainer,AlpacaDB/chainer,ronekko/chainer,jnishi/chainer,wkentaro/chainer,niboshi/chainer,wkentaro/chainer,chainer/chainer,okuta/chainer,AlpacaDB/chainer,keisuke-umezawa/chainer,benob/chainer,ktnyt/chainer,jnishi/chainer,kiyukuta/chainer,rezoo/chainer,cupy/cupy,chainer/chainer,ktnyt/chainer,aonotas/chainer,wkentaro/chainer,hvy/chainer,ysekky/chainer,okuta/chainer