Do not restrict version of cython
Do not restrict version of cython

niboshi/chainer,kiyukuta/chainer,delta2323/chainer,keisuke-umezawa/chainer,jnishi/chainer,niboshi/chainer,ronekko/chainer,ktnyt/chainer,keisuke-umezawa/chainer,ktnyt/chainer,jnishi/chainer,wkentaro/chainer,tkerola/chainer,chainer/chainer,chainer/chainer,ktnyt/chainer,anaruse/chainer,jnishi/chainer,okuta/chainer,hvy/chainer,ysekky/chainer,okuta/chainer,niboshi/chainer,hvy/chainer,cupy/cupy,jnishi/chainer,wkentaro/chainer,cupy/cupy,aonotas/chainer,kashif/chainer,rezoo/chainer,wkentaro/chainer,chainer/chainer,okuta/chainer,keisuke-umezawa/chainer,ktnyt/chainer,okuta/chainer,pfnet/chainer,chainer/chainer,cupy/cupy,wkentaro/chainer,hvy/chainer,cupy/cupy,niboshi/chainer,keisuke-umezawa/chainer,hvy/chainer