avoid using xp.stack in examples
avoid using xp.stack in examples

ktnyt/chainer,wkentaro/chainer,rezoo/chainer,niboshi/chainer,jnishi/chainer,jnishi/chainer,chainer/chainer,hvy/chainer,ktnyt/chainer,jnishi/chainer,chainer/chainer,chainer/chainer,wkentaro/chainer,wkentaro/chainer,hvy/chainer,tkerola/chainer,ktnyt/chainer,okuta/chainer,keisuke-umezawa/chainer,hvy/chainer,okuta/chainer,niboshi/chainer,jnishi/chainer,anaruse/chainer,niboshi/chainer,pfnet/chainer,niboshi/chainer,keisuke-umezawa/chainer,ktnyt/chainer,okuta/chainer,keisuke-umezawa/chainer,hvy/chainer,aonotas/chainer,okuta/chainer,wkentaro/chainer,chainer/chainer,keisuke-umezawa/chainer,ronekko/chainer