Modernization agains Django 1.5 and 1.6

The major change here is from the old example app (created with django 1.4 or earlier?) to a new example (created using django 1.6).

Beyond that there are some PEP8 formatting fixes and a handful of modifications to support newer versions of django and up-to python 3.3 (for django 1.5 and 1.6).