Remove magical djangosupport.configure()

[zeeg]

Attached is a patch which deprecates the magical django.contrib.jinja module (due to conflicts which it can cause trying to use it with a Django project). The change in a normal users codebase is as simple as replacing from django.contrib.jinja import N with from jinja.contrib.djangosupport import N.

The patch also includes 3 generic views:

* handler404 * handler500 * direct_to_template

[mitsuhiko]

Jinja2 no longer ships this magical extension and we won't change it for Jinja1 for backwards compatible reasons. We recommend Jinja2 anyways.