Correct the stable version in master branch
Correct the stable version in master branch

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