updated: Kommentare, Benutzerberechtigung
fixed: addSub, updated: kommentare
updated: listWaves()
added: wave_isValid für Gültigkeit des Objekts

updated: listWaves(), newWave(), Methoden prüfen Gültigkeit
added: SUB_DL
added: sub_isValid.

updated: methoden prüfen sub_isValid.
updated: wave_md5 protected
updated: get2()
added: ERR_IDNOTFOUND
added: debug.php