Copyright for pygalmesh source package in Mantic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: pygalmesh
Source: https://github.com/nschloe/pygalmesh

Files: *
Copyright: 2016-2020 Nico Schlömer 
License: GPL-3
 This software is released under the terms of the GNU General Public
 Licence, Version 3.
 .
 On a Debian system, the full text of the GPL can be found at
 /usr/share/common-licenses/GPL-3