South is module that used in Django before 1.7 version. Starting from 1.7 it totally merged into Django itself. But if you look for makemigrations and migrate equivalent for < 1.7 versions, take it:

python manage.py schemamigration app_name --auto
python manage.py migrate app_name 

app_name - application name
You also can ommit app_name when migrate:

python manage.py migrate