Add Code of Conduct
Add Code of Conduct

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