Copyright for vips source package in Focal

This package was debianized by Jay Berkenbilt  on
October 2, 2004.
It was taken over by Laszlo Boszormenyi (GCS)  on March 19,
2015.

It was downloaded from https://github.com/libvips/libvips

Upstream Maintainers:
  John Cupitt 
  Kirk Martinez 
  Joe Padfield 

Many others contributed as well; see the file THANKS for details.

Copyright (C) 1990-2010 Imperial College, London and others

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

On Debian systems, refer to /usr/share/common-licenses/LGPL-2.1
for the complete text of the GNU Lesser General Public License.