Corrected 'api_url_name' to 'api_name' in README.rst
Corrected 'api_url_name' to 'api_name' in README.rst

Corrected argument name 'api_url_name' to 'api_name' in the README.rst for function register_notify_callbacks in templatetags/notificationtags.py.
django-notifications/django-notifications,iberben/django-notifications,lukeburden/django-notifications,django-notifications/django-notifications,lukeburden/django-notifications,lukeburden/django-notifications,django-notifications/django-notifications,iberben/django-notifications,iberben/django-notifications