Add CUDA utility document
Add CUDA utility document

delta2323/chainer,tkerola/chainer,keisuke-umezawa/chainer,elviswf/chainer,sinhrks/chainer,hvy/chainer,jnishi/chainer,laysakura/chainer,ktnyt/chainer,ttakamura/chainer,sou81821/chainer,pfnet/chainer,okuta/chainer,chainer/chainer,ronekko/chainer,ysekky/chainer,hvy/chainer,niboshi/chainer,niboshi/chainer,wkentaro/chainer,umitanuki/chainer,truongdq/chainer,kashif/chainer,jnishi/chainer,ktnyt/chainer,kikusu/chainer,t-abe/chainer,cemoody/chainer,sinhrks/chainer,ktnyt/chainer,chainer/chainer,jfsantos/chainer,kikusu/chainer,masia02/chainer,hvy/chainer,jnishi/chainer,AlpacaDB/chainer,muupan/chainer,cupy/cupy,keisuke-umezawa/chainer,t-abe/chainer,minhpqn/chainer,truongdq/chainer,okuta/chainer,yanweifu/chainer,ikasumi/chainer,tereka114/chainer,woodshop/chainer,Kaisuke5/chainer,muupan/chainer,wkentaro/chainer,niboshi/chainer,chainer/chainer,kuwa32/chainer,anaruse/chainer,cupy/cupy,woodshop/complex-chainer,wkentaro/chainer,aonotas/chainer,cupy/cupy,tigerneil/chainer,keisuke-umezawa/chainer,ytoyama/yans_chainer_hackathon,tscohen/chainer,niboshi/chainer,okuta/chainer,benob/chainer,ttakamura/chainer,hidenori-t/chainer,benob/chainer,ktnyt/chainer,nushio3/chainer,hvy/chainer,okuta/chainer,AlpacaDB/chainer,keisuke-umezawa/chainer,cupy/cupy,nushio3/chainer,jnishi/chainer,chainer/chainer,kiyukuta/chainer,wavelets/chainer,bayerj/chainer,rezoo/chainer,1986ks/chainer,wkentaro/chainer