Autoclass

* `autodict`, `autohash` and `autoprops` now tolerate inherited constructors

* The submodule names were conflicting with the variable names: renamed them all
* The init file has been improved so as not to export symbols from other packages. Fixes [23](https://github.com/smarie/python-autoclass/issues/23)

* New annotation `autodict_override` that you can use to override `__iter__`, `__getitem__` or `__len__`. Fixes [22](https://github.com/smarie/python-autoclass/issues/22)

* In case of inheritance, the order of attributes in now better and reproductible. Fixes [20](https://github.com/smarie/python-autoclass/issues/20)
* Printed representation created by autodict now uses the same order than the generated keys iterator on the dictionary-faceted object.

* `autodict` does not add the `from_dict` class method anymore if this method already exists. If it does not already exist however, it is now always created (even if `only_constructor_args=False`)
* inheritance is now handled more correctly (not perfect but it seems to handle more cases) with `autodict`. Fixes [19](https://github.com/smarie/python-autoclass/issues/19)

* Fixed [18](https://github.com/smarie/python-autoclass/issues/18)