Required files:
Defined class and modules:
usage(msg = nil)self.read_config(configfile)add_href_filter(&b)add_src_filter(&b)build_tablecache_clearcache_dir=(dir)find_new(snap)href_filter(snap, parent_snap)initial_filterinitialize(target, savedir, depth)load_tree(fname)ofile(fname)read_local_file(snap)rewritesave(snap)save_html(snap)session(pages)set_local_file_name(snap)src_filter(snap, parent_snap)startstart_filevprint(str)xmkdir(dir)xsave(data, fname)xunlink(dir)