Merge pull request #35 from dotKom/pep8

Some PEP8 improvements
Merge pull request #34 from dotKom/python3

Add Python 3 support
Merge pull request #26 from dotKom/django17

Add Django 1.7 support
Release 1.4.0
Update README.md
Add Django 1.7 to testing environment
Initial migrations for Django 1.7
Merge branch 'master' into dev