Add documentation for the creatsuperuser target (added in [7590]) to doc/django-admin.txt

.. _Tutorial 2: ../tutorial02/

createsuperuser

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**New in Django development version**

Creates a superuser account (a user who has all permissions). This is

useful if you need to create an initial superuser account but did not

do so during ``syncdb``, or if you need to programmatically generate

superuser accounts for your site(s).

When run interactively, this command will prompt for a password for

the new superuser account; when run non-interactively, no password

will be set and the superuser account will not be able to log in until

a password has been manually set for it.

The username and e-mail address for the new account can be supplied by

using the ``--username`` and ``--email`` arguments on the command

line; if not supplied, ``createsuperuser`` will prompt for them when

running interactively.

createcachetable <tablename>

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