LICENSE

                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

 Copyright (C) 2007 Free Software Foundation, Inc.
 <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                          Preamble

  The GNU General Public License is a free, copyleft license for
software and other kinds of works.  The licenses for most software
and other practical works are designed to take away your freedom to
share and change the works.  By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change all
versions of a program--to make sure it remains free software for all
its users.

  (Full text available at: https://www.gnu.org/licenses/gpl-3.0.txt)