Add django-jenkins setup in a separate 'test' settings module
Adapt for python3 as tuple are no more concatenables, make test always inherit from base
Drop wsgiref from requirements, it breaks on py3
Add basic tox testing infra
Fix indent for flake8 pleasure, make sure project_name is where needed
Add a subtelty to avoid having to write the full project name in tox.ini which isn't transformed when using the template