Add k prefix
Add k prefix

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