Calendar objects and helper objects for calendar objects.

This package contains calendar objects, such as Events and Keywords, which are all subclasses of CalendarObject. It is assumed that CalendarObjects will be be contained in Caches. For convenience, an Events cache includes all the other Caches for a user, such as the Keywords cache.

Access to CalendarObject should be governed by the object's AccessRights. Currently, all such checks are made by the Cache's public methods, notably, add, delete, and replace. Other security checks may be required if the API is extended to allow for other methods of accessing, deleting, or changing CalendarObjects.