dateutils v0.3.0 released

[Sebastian Freundt]

This is a feature release.

Features:
- dgrep supports time zones both for the expression and the input
- timezones can be specified by alternative codes and [tzmap files][1]
- new tool dzone to inspect date/times in multiple timezones in bulk
- new tool dsort to sort input chronologically
- gengetopt and help2man maintainer dependencies removed
- lilian/julian inputs via `-i ldn` and `-i jdn`
- ymcw dates now follow ISO 8601 in using 07 to denote Sunday

Bugfixes:
- ddiff takes differences between a unix epoch stamp and a date/time
- zone converter assigns correct sign to zone difference when using %Z
- weekdays are properly calculated from epoch stamps (issue 24)


See info page examples and/or README.

[1]: http://www.fresse.org/dateutils/tzmaps.html