replaced code of superuser-function (user.class)

the code is used to show all categories (edit-event view).
little bit of cleanup
altered buildQuery (venue-model)
removed disabled meta-code/keyword code (event-view)
removed obsolete code event/eventlist raw-pages
added id/class Ical to div (eventslist-view)

This so people can define it in css if needed
removed archivebutton from venues-view

not sure why it was there.