* Did a fairly significant reworking of the calendar

* Did a fairly significant reworking of the calendar
  processing loop.  We have to pass the entire chain through
  to the callback function in order to gain just-in-time
  dezonification and decapsulation.  This will work; I saw
  the recurrence stay within local time durin expansion.  Right
  now the expansion isn't happening at all, but I'll fix that
  shortly.