Simple decoder/encoder for MNG animations

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/* *                                                                        * */
/* * COPYRIGHT NOTICE:                                                      * */
/* *                                                                        * */
/* * Copyright (c) 2000 Gerard Juyn (gerard@libmng.com)                     * */
/* * [You may insert additional notices after this sentence if you modify   * */
/* *  this source]                                                          * */
/* *                                                                        * */
/* * For the purposes of this copyright and license, "Contributing Authors" * */
/* * is defined as the following set of individuals:                        * */
/* *                                                                        * */
/* *    Gerard Juyn                                                         * */
/* *                                                                        * */
/* * The MNG Library is supplied "AS IS".  The Contributing Authors         * */
/* * disclaim all warranties, expressed or implied, including, without      * */
/* * limitation, the warranties of merchantability and of fitness for any   * */
/* * purpose.  The Contributing Authors assume no liability for direct,     * */
/* * indirect, incidental, special, exemplary, or consequential damages,    * */
/* * which may result from the use of the MNG 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;          * */
/* *    you must not claim that you wrote the original software.            * */
/* *                                                                        * */
/* * 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 specifically permit, without fee, and         * */
/* * encourage the use of this source code as a component to supporting     * */
/* * the MNG and JNG file format in commercial products.  If you use this   * */
/* * source code in a product, acknowledgment would be highly appreciated.  * */
/* *                                                                        * */
/* ************************************************************************** */
/* *                                                                        * */
/* * Parts of this software have been adapted from the libpng package.      * */
/* * Although this library supports all features from the PNG specification * */
/* * (as MNG descends from it) it does not require the libpng package.      * */
/* * It does require the zlib library and optionally the IJG jpeg library,  * */
/* * and/or the "little-cms" library by Marti Maria (depending on the       * */
/* * inclusion of support for JNG and Full-Color-Management respectively.   * */
/* *                                                                        * */
/* * This library's function is primarily to read and display MNG           * */
/* * animations. It is not meant as a full-featured image-editing           * */
/* * component! It does however offer creation and editing functionality    * */
/* * at the chunk level.                                                    * */
/* * (future modifications may include some more support for creation       * */
/* *  and or editing)                                                       * */
/* *                                                                        * */
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