;;; All rights reserved.
;;;
;;; Use and copying of this software and preparation of derivative works
;;; based upon this software are permitted, as long as this copyright notice
;;; is left intact.
;;;
;;; This software is made available AS IS, and the author makes no warranty
;;; about the software, its performance or its conformity to any specification.
;;;
;;; Suggestions, comments and requests for improvements are welcome
;;; and should be mailed to matthias@intellektik.informatik.th-darmstadt.de