Added user tests.
Added task model tests.
Added task model tests.
Updated django-extensions
Added user migrations.
Added workaround for plural related_names to user model.

As of 1.8 this will be fixed by using "default_related_name" in the respective model's Meta class.
https://docs.djangoproject.com/en/dev/ref/models/options/#default-related-name
example: http://gitelephant.cypresslab.net/django/commit/87d0a3384cc263fe0df749a28e2fbc1e1240f043