Copyright for ngraph-gtk source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0
Upstream-Name: ngraph-gtk
Source: https://github.com/htrb/ngraph-gtk

Files: *
Copyright: 2003, Satoshi ISHIZAKA 
           2009-2011, Ito Hiroyuki 
License: GPL-2+

Files: src/gettext.h
Copyright: 1995-1998, 2000-2002, 2004-2006, 2009 Free Software Foundation, Inc.
License: GPL-3+

Files: debian/*
Copyright: 2009-2011, Ito Hiroyuki 
           2011, Koichi Akabe 
License: GPL-2+

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 version 2 can be found in "/usr/share/common-licenses/GPL-2".

License: GPL-3+
 This program 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 3 of the License, or
 (at your option) any later version.
 .
 This program 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 version 3 can be found in "/usr/share/common-licenses/GPL-3".