test setup

This is a first draft for testing with travic-ci. Feel free to comment.

What id does?
Testing the library in a matrix of python 2.6 - 3.3 and django 1.3 - 1.6 using the django test runner. Validating the library against pep8 standard using flake8.

How it works?
``` $ python tests/runtests.py ```

You may want to connect your project with travis ci and put those funky badges in your readme-file yourself.