- Fix error in choosing when rrule._bymonth was added    superfluously by dateutil (bymonth *isn't* redundant   if the rule is yearly + bymonth + byweekday like, say,   Labor Day)
- Fix error in choosing when rrule._bymonth was added 
  superfluously by dateutil (bymonth *isn't* redundant
  if the rule is yearly + bymonth + byweekday like, say,
  Labor Day)


ajhoddinott/vobject