Redistribution and use in source and binary forms,
with or without modification,
are permitted
provided that the following conditions are met:
  - Redistributions of source code must retain
    the above copyright notice, this list of conditions
    and the following disclaimer.
  - 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.

THIS SOFTWARE IS PROVIDED
BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER OR CONTRIBUTORS 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. 

Zope Public License (ZPL) Version 2.1

A copyright notice accompanies this license document
that identifies the copyright holders.

This license has been certified as open source.
It has also been designated as GPL compatible
by the Free Software Foundation (FSF).

Redistribution and use in source and binary forms,
with or without modification,
are permitted
provided that the following conditions are met:
 1. Redistributions in source code must retain
    the accompanying copyright notice, this list of conditions,
    and the following disclaimer.
 2. Redistributions in binary form must reproduce
    the accompanying copyright notice, this list of conditions,
    and the following disclaimer
    in the documentation and/or other materials
    provided with the distribution.
 3. Names of the copyright holders must not be used
    to endorse or promote products derived from this software
    without prior written permission from the copyright holders.
 4. The right to distribute this software
    or to use it for any purpose
    does not give you the right
    to use Servicemarks (sm) or Trademarks (tm)
    of the copyright holders.
    Use of them is covered by separate agreement
    with the copyright holders.
 5. If any files are modified,
    you must cause the modified files to carry prominent notices
    stating that you changed the files and the date of any change.

Disclaimer

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS "AS IS"
AND ANY EXPRESSED 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 THE COPYRIGHT HOLDERS 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.