* underspecified ISO weekday dates can be parsed
* adding days to underspecified dates results in proper dates
* all tools with -S|--sed-mode now support -E|--empty-mode to
output an empty line when a line cannot be read.
* dateround supports day, week, month and year classes now
(issues/92)
* datediff can determine difference in nanoseconds between
two time values (issues/94)
OBS-URL: https://build.opensuse.org/package/show/utilities/dateutils?expand=0&rev=65
