The following copyrights apply to the btkeyboard sourcecode:
 * Copyright © 2009 Valerio Valerio <vdv100@gmail.com>

The btkeyboard source are distributed under the following 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, 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.

The complete text of the GNU General Public License can
be found in /usr/share/common-licenses/GPL-2 file or at the FSF foundation website.