ReStructuredText doc fixes

[Chris Beaven]

Attached patch fixes the following documentation bugs:

• authentication.txt: See _`Creating users` for example usage.
  Inline internal target, should be hyperlink.

• django-admin.txt:To run on 1.2.3.4:7000 with a `test` fixture::
  Interpreted text, should be inline literal.

• model-api.txt: some model metadata but can be overridden. See _`Table names` below.
  Inline internal target, should be hyperlink.

• release_notes_0.96.txt:version of `MySQLdb` as soon as possible, The "mysql_old" backend is
  Interpreted text, should be inline literal.

• tutorial01.txt: Terminal.app and navigate (using the `cd` command) to the directory
  Interpreted text, should be inline literal.

• url_dispatch.txt:be "included" in this place. See _`Including other URLconfs` below.
  Inline internal target, should be hyperlink.

• model-api.txt:that act on a single instance of a model object -- use _`Model methods`, not
  Inline internal target, should be hyperlink.

• templates_python.txt:These sorts of tags are called inclusion tags.
  Interpreted text, should just be normal text.

[Chris Beaven]

(the templates-python.txt file read: These sorts of tags are called `inclusion tags`.)

[Malcolm Tredinnick]

Fixed in [6743].