Include option to allow cascade delete during teardown

[mdalepiane]

I'd like to suggest the addition of an option to do a cascade delete during teardown.

When cascade delete is enabled, the teardown process should check whether the item it is trying to delete has any column that is a Foreign Key to another table. If this is the case, it should first try to delete any entry that depend on this item on other tables before proceeding with the item deletion.