0.003   2017-07-20 (PERLANCAR)

	- Add support for duration parsing (thanks Rudolf Leermakers).


0.002   2016-06-29 (PERLANCAR)

	- [Bugfix] Handle zero duration correctly, it should not be
	  formatted as 'P' but 'PT0H0M0S'.


0.001   2016-06-29 (PERLANCAR)

        - First release.