Copyright for ketchup source package in Xenial

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: ketchup
Upstream-Contact: Stratos Psomadakis 
Source: https://github.com/psomas/ketchup

Files: *
Copyright: 2004-2006, Matt Mackall 
           2010, Steven Rostedt 
           2011, Stratos Psomadakis 
License: GPL
 This software may be used and distributed according to the terms
 of the GNU General Public License, incorporated herein by reference.
 .
 On Debian systems, the complete text of the GNU General Public
 License can be found in `/usr/share/common-licenses/GPL'.

Files: debian/*
Copyright: 2005-2007, Baruch Even 
           2011-2012, Johann Felix Soden 
License: GPL
 The Debian packaging information is under the GPL.
 On Debian systems, the complete text of the GNU General Public
 License can be found in `/usr/share/common-licenses/GPL'.