Update top sentences in documentation
Update top sentences in documentation

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