* tests on Internet Explorer Macintosh for the latest features and bugfixes.
* improved pop-up handling (for cases were two nodes have the same content)
* complete handling of degradation (to non-js, js in non-supported browser)
* configuration documentation
* settings generator
* not sure: move configuration from array to object (better readability, better
  maintanbility)
* not sure: menu nodes templates (creating generic html takes much time!)
