r#"Copyright (C) 1998-2013, Brian Gladman, Worcester, UK. All
   rights reserved.

The redistribution and use of this software (with or without
changes) is allowed without the payment of fees or royalties
provided that:

   source code distributions include the above copyright notice,
   this list of conditions and the following disclaimer;

   binary distributions include the above copyright notice, this
   list of conditions and the following disclaimer in their
   documentation.

This software is provided 'as is' with no explicit or implied
warranties in respect of its operation, including, but not limited
to, correctness and fitness for purpose.
"#