title: NSManagedObject, cascade delete more than one relationship
body: <p>Is it possible to get Core Data cascade delete to delete objects more than one level deep?</p>
  
  <p>ObjectA has an NSSet of ObjectB, ObjectB has an NSSet of ObjectC</p>
  
  <p>When I delete ObjectA, I want ObjectB and ObjectC to be deleted.</p>
  
  <p>I set the relationship of ObjectA&lt;->>ObjectB to cascade, and the relationship of ObjhectB&lt;->>ObjectC to cascade but no dice. Any ideas?</p>