* Use nose as testing framework.
* Update requirements and create requirements for testing.
* Update code to work with Django Rest Framework 3.3+.
* Update code to work with Django Rest Framework Mongoengine 3.3+.
* Refactor main package to make audit a subpackage from audit_tools.
* Create a full tox.ini with coverage, nose, flake8 and sphinx.
* Create config file for coverage.
* Add integration with Travis CI.
* Add integration with Coveralls.