Fix ``AttributeError`` which start raised in ``DjangoPlugin.setup_django`` method after last commit.

Fixed: does not respect --noinput option

#53: Do not warn if ``datadiff`` is not installed and not used.

Merge branch 't54_twill_glocals'

#54: Add ``twill_glocals`` and ``twill_match`` attributes to ``tddspry.django.TestCase`` class.

#54: Add tests to future twill glocals shortcuts.

#53: Disable ``datadiff`` tests for ``test_django_nose`` target.

#53: Disable multidb testing for environments with Django 1.0 and 1.1.

#53: Disable ``datadiff`` testing in ``smarttest`` target.

#53: Update ``README``.

#53: Add ``datadiff`` support to ``tddspry``.

#53: Update tests requirements, add ``datadiff`` there, add tests for ``datadiff`` support in ``tddspry``.

#53: Disable ``--upgrade`` pip option in bootstrap script by default.

Update Django versions in tests requirements.

Merge branch 't52_test_django_nose'