Copyright for open-invaders source package in Xenial

This package was debianized by Siegfried-Angel Gevatter Pujals (RainCT) 
 on Mon, 25 Jun 2007 18:50:08 +0200.

It was downloaded from http://www.jamyskis.net/downloads/

Upstream Author: Darryl LeCount 

Copyright © 2006-2007 Darryl Lecount

License:

 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.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software 
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
 
 On Debian GNU/Linux derived systems, the complete text of the GNU General
 Public License can be found in the /usr/share/common-licenses/GPL file.

The Debian packaging is © 2007-2010, Siegfried-A. Gevatter 
and is licensed under the GPL, see `/usr/share/common-licenses/GPL'.

The code includes elements of the PMASK collision detection library by
Orz, which is in the public domain.