Added RecurrenceRuleExtended for RRULE which are complex like the icalendar ones. Use _always_ RecurrenceRule if they are simple .. like in vcalendar or with any extended or complex stuff like "RELATED=...".
Added RecurrenceRuleExtended for RRULE which are complex like the
icalendar ones. Use _always_ RecurrenceRule if they are simple .. like
in vcalendar or with any extended or complex stuff like "RELATED=...".

Splitting RecurrenceRule makes it possible for the merger to demerge not
compatible RRULEs.

TODO: shorten the RecurrenceRule list to the list of elements which are
really supported.

Added FreeBusy element.
Added RFC2445 references.


git-svn-id: e31799a7ad59d6ea355ca047c69e0aee8a59fcd3@1875 53f5c7ee-bee3-0310-bbc5-ea0e15fffd5e

luizluca/opensync-luizluca,luizluca/opensync-luizluca