\+ Added ``NotImplementedInAPIError`` that is raised every time a functionality is requested by the user that is not covered by the providers API
\+ Added the ``IncompleteVehicleMixin`` and ``IncompleteTrainMixin`` mixin classes, that will raise a ``NotImplementedInAPIError`` on not implemented abstract methods
\+ Added the ``DummyDataConnector`` that is now the default ``DataConnector`` connected to a ``Train`` object
\+ Added support for FlixTrains ``FlixTainment`` API
Known issues:
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Can't use ``FlixTainment`` because of wrong MRO - fixed in v1.3.1