Copyright for desktop-webmail source package in Xenial

Source:
	Source can be obtained from project website:
		http://www.launchpad.net/desktop-webmail

Authors:
	Alexander Sack 

The packaging and source tree is Copyright 2010, Canonical Ltd and licensed
under the terms of the GPLv3; see: /usr/share/common-licenses/GPL-3:

  Copyright (C) 2010  Canonical Ltd.

  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, version 3 of the License,

  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.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see .