2.3. TC CALDAV

VPATCH and VINSTANCE are mature enough to begin implementation and testing. Enhanced Sync draft starting to stabilize. Closed and merged into TC CALENDAR.

TC CALENDAR established to further work across iCalendar, iMIP, iTIP, CalDAV, etc. and outstanding work merged to TC CALENDAR. Will initially focus on iSchedule, VPATCH, VINSTANCE, Enhanced Synd.