Version 1.4 - November 2013
- Documentation typo fixes and packaging metadata improvements, thanks to David Steinbrunner.

Version 1.3 - January 2011
- Added invert() method, thanks to Kevin Ryde.
- Some code and documentation cleanup and updates to outdated links.

Version 1.2 - September 2008
- Fixed error in constructor POD documentation
- Adjusted version number in spec file, broken in 1.1

Version 1.1 - September 2008
- Added clone() method
- Documentation additions and cleanups
- POD tweaks for improved appearance on search.cpan.org
- Listed dependencies in Makefile.PL
- Added Changes file

Version 1.0 - August 2008
- Initial release