Copyright for xdelta3 source package in Nile V2.0

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: xdelta
Source: https://github.com/jmacd/xdelta/
Files-Excluded: */draft-korn-vcdiff.txt 

Files: *
Copyright: 2001, 2003-2016.  Joshua P. MacDonald
License: GPL-2+

Files: debian/*
Copyright: 2007-2016 A Mennucc1 
License: GPL-2+

License: GPL-2+
  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 2 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.
 .
  On Debian systems, a copy of the GNU General Public License is available
  in /usr/share/common-licenses/GPL-2.