Add Django 1.7 compatibility.
Mention SOUTH_MIGRATION_MODULES settings in installation documentation
Add SOUTH_MIGRATION_MODULES settings in test_settings.py
Move old migrations directory to south_migrations dedicated directory
Update tox.ini to use Django 1.7 release
Add new migrations directory which contains the new schema
Update travis with py34 environment and dj17
Exclude Django 1.7 for Python 2.6