2018-08-05 FIXED: Release of Django 2.1 has fixed this problem!
2018-06-05 Added LICENSE.txt using MIT LICENSE.
Copyright (c) 2018 Ferd Snidely
2018-06-04
Added Product5 model using ForeignKey as primary key to test whether it also has the issue. It fails as well.
Added admin pages for models. Just in case someone wants data to play with the models.
Editted README to include examples.
2018-06-03 Barebones app to test serialization problem.
Copy models.py and test_models.py over and excised extraneous models.