Permission to use, copy, modify and distribute this software and its
documentation is hereby granted, provided that both the copyright notice and
this permission notice appear in all copies of the software, derivative works or
modified versions, and any portions thereof, and that both notices appear in
supporting documentation.

CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION.
CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
RESULTING FROM THE USE OF THIS SOFTWARE.

Carnegie Mellon requests users of this software to return to

  Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 
  School of Computer Science 
  Carnegie Mellon University 
  Pittsburgh PA 15213-3890

any improvements or extensions that they make and grant Carnegie the rights to
redistribute these changes.