Added missing, required modules to setup.py

Added missing but required modules by julython to setup.py.

Added modules:
'south',
'fabric >= 1.5.1'
'django-social-auth >= 0.7.12',
'django-debug-toolbar >= 0.9.0',
'django-tastypie >= 0.9.0',
'requests',
'iso8601 >= 0.1.4',