Add documentation on how to run tests

[banagale]

No description provided.

[banagale]

Stub:

Running Django-Address Tests

Django-address currently has partial form and model test coverage using django.test.TestCase.

To run the current tests:

1. Clone django-address locally.
2. Navigate to the example site, . .../django-address/django-address/example_site
3. Create a virtual environment and install the example site dependencies in requirements.txt
4. Run ./manage.py test

[banagale]

This is added in develop and will go out on the next release. In reviewing this, I realized that this package is a bit out of step with current practices on how standalone apps handle tests. Added #124 to look at this.

Note, tests currently fail on test_unique_name_state