PNGGauntlet is Copyright (c) 2005-2012, Benjamin Hollis
All rights reserved.

Redistribution and use in binary forms are permitted provided that the following conditions are met:
    * Redistributions with modification or as part of a larger software package are not permitted without specific prior written permission.
    * Redistributions, with or without modification, must be distributed free of charge, unless specific prior written permission is given.
    * 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.
    * Neither the name of PNGGauntlet nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

Permission for any of the above conditions may be requested from Benjamin Hollis, ben@benhollis.net.

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 OWNER 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.


PNGOUT is used with permission from Ken Silverman, http://www.advsys.net/ken/
DeflOpt is used with permission from Ben Jos Walbeehm, http://www.walbeehm.com
OptiPNG is licensed under the zlib/libpng license (see support/optipng-license.txt), http://optipng.sourceforge.net/