Called after an event has been added to the calendar.
function( addInfo )
This fires after Calendar::addEvent is called or when an external event is dropped from outside the calendar or from a different calendar. If being called as a result of the latter two,
eventAdd will be fired after eventReceive.
addInfo argument has the following properties:
|event||an Event Object for the added event|
|relatedEvents||an array of other related Event Objects that have also been added. an event might have other recurring event instances or might be linked to other events with the same
|revert||a function that can be called to reverse this action|