Deduplicationdict

* Added support for multi hash length

* Moved all class variables to object variables

* Added `__deepcopy__` and more tests
* Optimizations of `__setitem__` by value of type DeDuplication has `value_dict` consistent
* Added `skip_update_on_setitem` to `DeDuplication` to skip update `value_dict` on `__setitem__`

* Optimizations and remove redundant code

* Public release