From Ulf Jasper <ulf.jasper@web.de>:

From  Ulf Jasper  <ulf.jasper@web.de>:

(icalendar-version): Now at 0.12.
(icalendar-duration-correction): Remove.
(icalendar--get-event-properties): Split result at commas.
(icalendar--decode-isoduration): New optional argument
DURATION-CORRECTION.
(icalendar--convert-ordinary-to-ical)
(icalendar--convert-weekly-to-ical)
(icalendar--convert-yearly-to-ical)
(icalendar--convert-sexp-to-ical)
(icalendar--convert-block-to-ical)
(icalendar--convert-float-to-ical)
(icalendar--convert-date-to-ical)
(icalendar--convert-cyclic-to-ical)
(icalendar--convert-anniversary-to-ical): New functions, extracted
from icalendar-export-region, with bug fixes.
(icalendar-export-region): Use the above functions.
(icalendar-import-buffer): Check before saving diary file.
(icalendar--convert-recurring-to-diary)
(icalendar--convert-non-recurring-all-day-to-diary)
(icalendar--convert-non-recurring-not-all-day-to-diary): New
functions, extracted from icalendar--convert-ical-to-diary, with
bug fixes.
(icalendar--convert-ical-to-diary): Use the above functions.