[Dev] iCalendar import and export

[Jeffrey]

Hi Folks,

iCalendar import and export is now working at a very rudimentary level. 
  To get it working, you'll need to do a cvs update and make install or 
make world to get the latest version of vobject.

To test it out, import and export are on the Test menu.  There's no file 
selector right now, it just imports $CHANDLERHOME/import.ics and exports 
to $CHANDLERHOME/export.ics.

Import arbitrarily limits recurring events to 10 instances.  Alarms 
aren't wired up yet.  I've just noticed a bug in vobject that omits 
anything after a comma when importing, that'll be fixed soon.

Export currently exports all Calendar Events.  I'm not yet doing much 
with UIDs and sequence information so while you should be able to create 
an event in iCal, export to .ics, import into Chandler, then re-export 
it, the UID won't stay constant and reimporting into iCal will create a 
duplicate event, not an update.  Stay tuned for improved functionality 
in the near future, though.

Happy calendaring,
Jeffrey