[TYPO3-mvc] Cloning Model and add to repository

[Sebastian Kurfürst]

Hey,


> In the mean time __clone() should then raise an exception "Cloning of models is (currently) not
> supported".
> 
> Shall I file a bug for this?
Nope, that would be counterproductive, as clone() is right now used
internally in the Property Mapper quite heavily, and it is relied upon
the current behavior.

Greets,
Sebastian