Check how regulizers are implemented

[wfeschen]

At the moment almost all regularizations are applied in the function apply_constraints() which operates on the entire object and not inside the update loops of the engines. The exception is tv, which does. We have to check if this is intentional.

[dboonz]

Can you take a look, lars?

It seems that at the moment we have an update rule called

``` objectPatchUpdate_TV(self, objectPatch: np.ndarray, DELTA: np.ndarray):````

This is run every 5 iterations by default when update_TV is turned on. It's changing the patch update. Is this really correct?