message: Move TileMap static data to unnamed namespace
diff: using namespace NAS2D;
  +namespace {
  const std::string MAP_TERRAIN_EXTENSION = "_a.png";
  const int MAP_WIDTH = 300;
  @@ -83,6 +84,7 @@ const NAS2D::Color& overlayColor(Tile::Overlay overlay, bool isHighlighted)
  return overlayColor(overlay);
  }
  +}
  TileMap::TileMap(const std::string& mapPath, const std::string& tilesetPath, int maxDepth, int mineCount, Planet::Hostility hostility, bool shouldSetupMines) :
  