Add Astars pathing to ingame options (#124)

* Enabled astars pathing

* Add toggleable pathfinding choice to ingame options

You can choose between original and A* pathfinding algorithms

Tactical/PATHAI.H

@@ -10,12 +10,6 @@
 #define _PATHAI_H
 #include "isometric utils.h"
 
-// WANNE: Please do not use ASTAR pathing,
-// because it is a HUGH PERFORMANCE KILLER on big maps!!
-//#define USE_ASTAR_PATHS
-
-#ifdef USE_ASTAR_PATHS
-
 namespace ASTAR {
 #include "BinaryHeap.hpp"
 #include <vector>
@@ -188,8 +182,6 @@ private:
 
 };//end namespace ASTAR
 
-#endif// USE_ASTAR_PATHS
-
 
 BOOLEAN InitPathAI( void );
 void ShutDownPathAI( void );