Clean-up imagenet example
Clean-up imagenet example

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