South compatibility, GeoDjango versions, LiveModel, LiveGeoModel

South compatibility, GeoDjango versions, LiveModel, LiveGeoModel

Tests pass. I added an extra test run of aal the field tests to test a LiveModel against a hand coded Model with a LiveField.

I changed the file names to match the Django equivalents.
Also, consider naming the app 'livefield' instead of 'django-livefield'. Keep the repo and the PyPI name to django-livefield of course.