add F.repeat to reference
add F.repeat to reference

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