Redistribution and use in source and binary forms,
with or without modification,
are permitted
provided that the following conditions are met:
1. Redistributions of source code must retain
   the above copyright notice, this list of conditions
   and the following disclaimer.
2. Redistributions in binary form must reproduce
   the above copyright notice, this list of conditions
   and the following disclaimer
   in the documentation and/or other materials
   provided with the distribution.
3. All advertising materials
   mentioning features or use of this software
   must display the following acknowledgement:
       This product includes software developed by Luke Howard.
4. The name of the other may not be used
   to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE LUKE HOWARD ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL LUKE HOWARD BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS;
OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.