Refactor F.split_axis
Refactor F.split_axis

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