Fix the changelog date of version 0.2
docs: remove tar file reference
Porting to Python 3.2

Removed compatibility_tools (because we aim to Python 2.7 and Python 3.2)
Performed 2to3 and modified
Usage of django.utils.six which adds dependency on Django >= 1.4.2
Port new code to Python 3 as well, fix six.with_metaclass() issues

Many thanks to @atheiste for the big porting steps!