Add links to PyPI and Crate.io in README file
fix typo for maintainer.
Allow custom users
Failing test for custom foreign key
fix model + tests for foreign keys (issue #38)
Merge branch 'foreignkeys' of https://github.com/treyhunner/django-simple-history into foreign-key-tests

Conflicts:
	simple_history/models.py
	simple_history/tests/tests.py
Failing test for foreign keys defined with a string