2006-11-28 v0.06
  * Added default for custom sphere case
2006-11-26 v0.05
  * Added Documentation
  * changed indent of one if statement
2006-11-26 v0.04
  * Added Documentation
2006-11-26 v0.03
  * Added Documentation
  * Added Example
2006-11-25 v0.02
  * Fixed list method and example
2006-11-25 v0.01
  * Original version
