add venue_visibility field

Author: Nathan Hamblen

meetup_api_client.py

@@ -269,7 +269,7 @@ class Event(API_Item):
  datafields = ['id', 'name', 'updated', 'time', 'photo_url', 'event_url', 'description', 'status', \
  'rsvpcount', 'no_rsvpcount', 'maybe_rsvpcount', \
  'venue_id', 'venue_name', 'venue_phone', 'venue_address1', 'venue_address3', 'venue_address2', 'venue_city', 'venue_state', 'venue_zip', \
- 'venue_map', 'venue_lat', 'venue_lon']
+ 'venue_map', 'venue_lat', 'venue_lon', 'venue_visibility']
 
  def __str__(self):
  return 'Event %s named %s at %s (url: %s)' % (self.id, self.name, self.time, self.event_url)