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