Added compatibility with python 3 in setup.py
Changed version to allow dependency override in setup.py
has_key was removed in python 3: replacing with 'in'
Modified tests for python 3 compatibility
Don't use PIP_USE_MIRRORS, it's deprecated.
Merge branch 'master' of https://github.com/MirkoRossini/django-mobile
Testing against Python 3.3, but removing tests for Django 1.4