Initial Tox and Travis setup
Added code to the models.py files, to make everything run as smooth in Python 3 as it does in Python 2.
Using tox can leave eggs in your CWD, ignore them
Add six, the Python 2 and 3 comabitability utility
Merge pull request #28 from d0ugal/tox

Initial Tox and Travis setup
Drop six back out, we get it with Django
Merge pull request #29 from d0ugal/tox

Drop six back out, we get it with Django
Fix tests under Python 3
Merge pull request #30 from d0ugal/tox

Fix tests under Python 3
small cleanup, mostly pep8 related modifications
updated tox to run with python 2.7, 3.3 and 3.4. Tests done on Django
1.5, 1.6 and 1.7
nicer tox.ini layout
updating the README with recent contributors (thanks again) and small
note on which versions the app has been tested against
Update the Travis config to match recent Tox changes

For Travis to pick up the configs unfortunately it needs all the
possible env names to be listed.