Copyright for apngasm source package in Yangtze V1.0

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0
Upstream-Name: APNG Assembler
Upstream-Contact: Max Stepin 
Source: https://sourceforge.net/projects/apngasm
X-Upstream-Bugs: https://sourceforge.net/projects/apngasm/forums/forum/1151026

Files: *
Copyright: 2009-2016 Max Stepin 
License: Zlib

Files: libpng/*
Copyright: 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
           1996, 1997 Andreas Dilger
           1995, 1996 Guy Eric Schalnat, Group 42, Inc.
License: Zlib

Files: zlib/*
Copyright: 1995-2013 Jean-loup Gailly and Mark Adler
License: Zlib

Files: zopfli/*
Copyright: 2011-2013 Google Inc.
License: Apache-2.0

Files: debian/*
Copyright: 2013 Jari Aalto 
           2019 Giovani Augusto Ferreira 
License: GPL-2+

License: Zlib
 This software is provided 'as-is', without any express or implied
 warranty.  In no event will the authors be held liable for any damages
 arising from the use of this software.
 .
 Permission is granted to anyone to use this software for any purpose,
 including commercial applications, and to alter it and redistribute it
 freely, subject to the following restrictions:
 .
 1. The origin of this software must not be misrepresented; you must not
    claim that you wrote the original software. If you use this software
    in a product, an acknowledgment in the product documentation would be
    appreciated but is not required.
 2. Altered source versions must be plainly marked as such, and must not be
    misrepresented as being the original software.
 3. This notice may not be removed or altered from any source distribution.

License: Apache-2.0
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 .
 http://www.apache.org/licenses/LICENSE-2.0
 .
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 .
 On Debian systems, the complete text of the Apache version 2.0 license
 can be found in "/usr/share/common-licenses/Apache-2.0".

License: GPL-2+
 This package is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 .
 This package is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 GNU General Public License for more details.
 .
 You should have received a copy of the GNU General Public License
 along with this program. If not, see .
 .
 On Debian systems, the complete text of the GNU General
 Public License can be found in "/usr/share/common-licenses/GPL-2".