Copyright for nailgun source package in Focal

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: nailgun
Upstream-Contact: Martian Software, Inc
Source: https://github.com/martylamb/nailgun

Files: *
Copyright: 2004-2012, Martian Software, Inc
License: Apache-2
 On Debian systems, the full text of the Apache License version 2.0
 can be found in the file `/usr/share/common-licenses/Apache-2.0'.

Files: debian/*
Copyright: 2010-2012, Hideki Yamane 
           2010, Torsten Werner 
License: GPL-3+
 On Debian systems, the full text of the GNU General Public License version 3
 can be found in the file `/usr/share/common-licenses/GPL-3'.