add serialize to summary
add serialize to summary

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