License

  License

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

    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.  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.