Feature for mactime: support for times on [DATE]

mactime -b mactime_file 2012-02-02
mactime -b mactime_file 2012-02-02T14:25:00
mactime -b mactime_file 2012-02-01..2012-02-03
mactime -b mactime_file 2012-02-02T14:25:00..2012-02-02T15:25:00
mactime -b mactime_file 2012-02-02T14:25:00..2012-02-03
mactime -b mactime_file 2012-02-02..2012-02-02T15:25:00
mactime: (typo) missing word in usage (when non-existing timezone is used)
mactime: man-page updated for [DATE]s with time
mactime: manpage. -z list = list valid timezones
Merge pull request #348 from aapo/master

mactime: Support for time in dates