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  This copy of the libpng notices is provided for your convenience.  In case of
  any discrepancy between this copy and the notices in the file png.h that is
  included in the libpng distribution, the latter shall prevail.
  
  COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
  
  If you modify libpng you may insert additional notices immediately following
  this sentence.
  
  This code is released under the libpng license.
  
  libpng versions 1.2.6, August 15, 2004, through 1.2.38, July 16, 2009, are
  Copyright (c) 2004, 2006-2009 Glenn Randers-Pehrson, and are
  distributed according to the same disclaimer and license as libpng-1.2.5
  with the following individual added to the list of Contributing Authors
  
     Cosmin Truta
  
  libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are
  Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
  distributed according to the same disclaimer and license as libpng-1.0.6
  with the following individuals added to the list of Contributing Authors
  
     Simon-Pierre Cadieux
     Eric S. Raymond
     Gilles Vollant
  
  and with the following additions to the disclaimer:
  
     There is no warranty against interference with your enjoyment of the
     library or against infringement.  There is no warranty that our
     efforts or the library will fulfill any of your particular purposes
     or needs.  This library is provided with all faults, and the entire
     risk of satisfactory quality, performance, accuracy, and effort is with
     the user.
  
  libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
  Copyright (c) 1998, 1999 Glenn Randers-Pehrson, and are
  distributed according to the same disclaimer and license as libpng-0.96,
  with the following individuals added to the list of Contributing Authors:
  
     Tom Lane
     Glenn Randers-Pehrson
     Willem van Schaik
  
  libpng versions 0.89, June 1996, through 0.96, May 1997, are
  Copyright (c) 1996, 1997 Andreas Dilger
  Distributed according to the same disclaimer and license as libpng-0.88,
  with the following individuals added to the list of Contributing Authors:
  
     John Bowler
     Kevin Bracey
     Sam Bushell
     Magnus Holmgren
     Greg Roelofs
     Tom Tanner
  
  libpng versions 0.5, May 1995, through 0.88, January 1996, are
  Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  
  For the purposes of this copyright and license, "Contributing Authors"
  is defined as the following set of individuals:
  
     Andreas Dilger
     Dave Martindale
     Guy Eric Schalnat
     Paul Schmidt
     Tim Wegner
  
  The PNG Reference Library is supplied "AS IS".  The Contributing Authors
  and Group 42, Inc. disclaim all warranties, expressed or implied,
  including, without limitation, the warranties of merchantability and of
  fitness for any purpose.  The Contributing Authors and Group 42, Inc.
  assume no liability for direct, indirect, incidental, special, exemplary,
  or consequential damages, which may result from the use of the PNG
  Reference Library, even if advised of the possibility of such damage.
  
  Permission is hereby granted to use, copy, modify, and distribute this
  source code, or portions hereof, for any purpose, without fee, subject
  to the following restrictions:
  
  1. The origin of this source code must not be misrepresented.
  
  2. Altered versions must be plainly marked as such and must not
     be misrepresented as being the original source.
  
  3. This Copyright notice may not be removed or altered from any
     source or altered source distribution.
  
  The Contributing Authors and Group 42, Inc. specifically permit, without
  fee, and encourage the use of this source code as a component to
  supporting the PNG file format in commercial products.  If you use this
  source code in a product, acknowledgment is not required but would be
  appreciated.
  
  
  A "png_get_copyright" function is available, for convenient use in "about"
  boxes and the like:
  
     printf("%s",png_get_copyright(NULL));
  
  Also, the PNG logo (in PNG format, of course) is supplied in the
  files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
  
  Libpng is OSI Certified Open Source Software.  OSI Certified Open Source is a
  certification mark of the Open Source Initiative.
  
  Glenn Randers-Pehrson
  glennrp at users.sourceforge.net
  July 16, 2009