Zone heuristic added to config

AI/src/game/config.cpp

@@ -7,6 +7,7 @@
 #include "number_direction_freedom_heuristic.hpp"
 #include "points_heuristic.hpp"
 #include "go_left_up_heuristic.hpp"
+#include "zone_heuristic.hpp"
 namespace game {
 
 
@@ -88,6 +89,8 @@ namespace game {
             *h = new mcts::points_heuristic();
 	    }else if(value == "movement_freedom") {
             *h = new mcts::movement_freedom_heuristic();
+        }else if(value == "zone") {
+            *h = new mcts::zone_heuristic();
         }else if(value == "default") {
             *h = new mcts::penguin_heuristic();
         } else {