During testing, it made life easier to automatically delete new events
sometimes. We don't want to do that any more :)
def get_ex_events(calendar):
ans={}
for event in calendar.all().only('changekey','item_id','gcal_link'):
-# if event.gcal_link is not None:
-# event.delete()
-# continue
if event.item_id in ans:
logger.warning("Event item_id %s was duplicated!" % event.item_id)
ans[event.item_id] = CachedExEvent(event.changekey,event.gcal_link)