Support py2 unicode string
Support py2 unicode string

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