Bernie Bright:

Bernie Bright:
- Added initial_value argument, in milliseconds, that specifies when
  event is first run.  The default value of -1 triggers the event
  immediately as per the existing behaviour.  A repeat_value greater than
  zero runs the event no less than every 'repeat_value' milliseconds
  afterwards.  A repeat_value of zero deletes the event.
- Modified run queue behaviour such that only one event per frame is
  run.