Fixed #6890 -- Removed duplicate instruction to rename the `polls/detail.htm`...

by generic views.

The ``vote()`` view is still required. However, it must be modified to match

the new templates and context variables. Change the template call from

``polls/detail.html`` to ``polls/poll_detail.html``, and pass ``object`` in the

context instead of ``poll``.

the new context variables. In the ``render_to_repsonse()`` call, rename the

``poll`` context variable to ``object``.

The last thing to do is fix the URL handling to account for the use of generic

views. In the vote view above, we used the ``reverse()`` function to avoid