message: Forward declare TileMap in MapViewStateHelper
diff: #include "../Common.h"
  #include "../StructureManager.h"
  -#include "../Map/TileMap.h"
  namespace NAS2D {
  @@ -20,6 +19,7 @@ namespace NAS2D {
  }
  }
  +class TileMap;
  class Warehouse; /**< Forward declaration for getAvailableWarehouse() function. */
  class RobotCommand; /**< Forward declaration for getAvailableRobotCommand() function. */
  class RobotPool;
  