/**
* Default constructor
*/
public TileSet() {
tiles = new NumberedSet();
images = new NumberedSet();
tileDimensions = new Rectangle(0,0,0,0);
defaultTileProperties = new Properties();
tilesetChangeListeners = new LinkedList();
whiteTile = new Tile();
whiteTile.setImage(new Image(Display.getDefault(),new Rectangle(0,0,32,32)));