Copyright 2010 Kevin Ryde

This file is part of Image-Base-GD.

Image-Base-GD 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; either version 3, or (at your option)
any later version.

Image-Base-GD 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 can get a copy of the GNU General Public License online at
<http://www.gnu.org/licenses/>.



Version 2, June 2010
    - fix badly botched xy() set pixel
    - better colour None handling
    - new add_colours()

Version 1, June 2010
    - the first version
