Copyright (c) 2001-2005 Andreas Östling 
  All rights reserved.

  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. Neither the name of the author nor the names of its
     contributors may be used to endorse or promote products
     derived from this software without specific prior written
     permission. 

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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  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
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  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.