2009-08-31 v0.06
  * Documentation
  * Cleaned up examples
2009-08-31 v0.05
2009-05-05 v0.04
  * require GD >= 2.02
2007-07-25 v0.02
  * Updated the color algorithm to allocate unique colors only
2007-07-23 v0.01
  * Original version based on GD::Graph::Polar
