Copyright for yorick-yao source package in Xenial

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Contact: François Rigaut 
Source: https://github.com/frigaut/yao/tarball/4.9.1

Files: *
Copyright: © 2007-2012, François Rigaut 
           © 2008-2012, Thibaut Paumard 
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 (to receive a  copy  of  the GNU
 General Public License, write to the Free Software Foundation, Inc.,  51
 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA).
 .
 On Debian systems, the complete text of the GNU General
 Public License can be found in `/usr/share/common-licenses/GPL-2'.