Add an acceptance test for the multi-graph feature
Add an acceptance test for the multi-graph feature

wkentaro/chainer,ktnyt/chainer,chainer/chainer,pfnet/chainer,jnishi/chainer,niboshi/chainer,jnishi/chainer,wkentaro/chainer,niboshi/chainer,keisuke-umezawa/chainer,ktnyt/chainer,ktnyt/chainer,keisuke-umezawa/chainer,niboshi/chainer,chainer/chainer,okuta/chainer,chainer/chainer,niboshi/chainer,wkentaro/chainer,hvy/chainer,okuta/chainer,ktnyt/chainer,jnishi/chainer,hvy/chainer,hvy/chainer,tkerola/chainer,chainer/chainer,keisuke-umezawa/chainer,wkentaro/chainer,jnishi/chainer,okuta/chainer,hvy/chainer,keisuke-umezawa/chainer,okuta/chainer