[1.8.x] Improved "“standalone” Django usage" example.

``configure()``, you'll need to call :func:`django.setup()` to load your

settings and populate Django's application registry. For example::

    import django

    from django.conf import settings

    from myapp import myapp_defaults

    settings.configure(default_settings=myapp_defaults, DEBUG=True)

    django.setup()

    # Now this script can use any part of Django it needs.

    # Now this script or any imported module can use any part of Django it needs.

    from myapp import models

Note that calling ``django.setup()`` is only necessary if your code is truly

standalone. When invoked by your Web server, or through :doc:`django-admin