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