Also replace root version to Python3

Philip Kahn

2018-05-04 3459c47bfa02d23d300df9a44ba3ec9c958850fe

 src/cost_layer.h

@@ -1,7 +1,7 @@
#ifndef COST_LAYER_H
#define COST_LAYER_H
#include "params.h"
#include "layer.h"
#include "network.h"

typedef layer cost_layer;