Also:
- BioBlend.objects: Remove deprecated ``run()`` method of ``Workflow``.
- BioBlend.objects: Replace ``convert_input_map()`` method of ``Workflow``
  with an internal method.
- BioBlend.objects: in ``Workflow.invoke()``, check that the workflow is
  mapped and runnable before invoking, allow the ``inputs`` parameter to be
  an instance of a ``Dataset`` subclass, and allow the ``history`` parameter
  to be the name of a new history.
- BioBlend.objects: in ``HistoryDatasetAssociation.get_stream()``, wait for
  the dataset to be ready.
- BioBlend.objects: Added new ``datasets`` and ``dataset_collections``
  attributes to ``GalaxyInstance`` objects, which are instances of the new
  ``ObjDatasetClient`` and ``ObjDatasetCollectionClient`` respectively.
- BioBlend.objects: Add ``refresh()``, ``get_outputs()`` and
  ``get_output_collections()`` methods to ``InvocationStep``.