------------------
Features
^^^^^^^^
* test for an empty submission (no samples)
* updated `root.json`, `userSubmission.json` test data
* submissionStatus is no longer an attribute, when feching submission by name
is present when getting user submissions
* follow submissionStatus link (if necessary)
* update submission status after create a new submission
* update submission status after ``get_submission_by_name``
* update submission status after reload a just finalized submission
* ``Domain.users`` returns ``User`` objects in a list
* improved ``Submission.get_samples`` method