Copyright for survex source package in Xenial

This package was debianized by Wookey  on
Wed, 23 Aug 2000 22:30:47 +0100.

It was downloaded from http://survex.com/

Upstream Author: Olly Betts 

Copyright:

Copyright (C) 1991-2016 Olly Betts
Copyright (C) 2000-2003,2005,2006 Mark R. Shinwell
Copyright (C) 2001,2004 Philip Underwood
Copyright (C) 2003 Fabrice Bellard
Copyright (C) 2004 Simeon Warner
Copyright (C) 2005 Martin Green
Copyright (C) 2004,2005 John Pybus
Copyright (C) 1987,88,89,90,91,92,93,94,95,96,97,98,99,2000,2001,2002
					Free Software Foundation, Inc.
Copyright (C) 2012 Olaf Kähler
Copyright (C) 2006,2014 Martin Budaj
Copyright (C) 2000  Edward A Williams 

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.

On Debian systems the complete text of the GNU GPL can be found in 
/usr/share/common-licenses/GPL-2