Copyright for scilab source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: Scilab
Source: https://www.scilab.org/
Files-Excluded: scilab/Visual-Studio-settings *dll

Files: *
Copyright:  1989-2008 INRIA
	    1989-2007 ENPC
	    2008-2012 DIGITEO
	    2012-2016 Scilab Enterprises
	    2017-2018 ESI Group
License: GPL-2+

Files: debian/*
Copyright: Torsten Werner 
 	   Sylvestre Ledru 
	   Julien Puydt 
License: GPL-2+

License: GPL-2+
 This software 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 software 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 mwrank; if not, 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'