Add DEBUG variable
Add DEBUG variable

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