code: public boolean createBundle (
          File target, TileSetBundle bundle, ImageProvider improv, String imageBase, long newestMod)
          throws IOException
      {
          return createBundleJar(target, bundle, improv, imageBase, _keepRawPngs, _uncompressed);
      }
docs: Finish the creation of a tileset bundle jar file.
  
  @param target the tileset bundle file that will be created.
  @param bundle contains the tilesets we'd like to save out to the bundle.
  @param improv the image provider.
  @param imageBase the base directory for getting images for non
  @param newestMod the most recent modification to any part of the bundle.  By default we
  ignore this since we normally duck out if we're up to date.
  ObjectTileSet tilesets.