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 5, July 2010
    - lower a couple of stray "use 5.010"s

Version 4, July 2010
    - workaround for apparent GD bug where an unfilled y1==y2
      rectangle gets sides y-1 to y+1, outside the x1,y1 x2,y2 area

Version 3, July 2010
    - fix ellipse() positioning
    - add 4-digit hex colours too
    - add $image->new() to copy

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

Version 1, June 2010
    - the first version