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
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  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
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     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.