renamed ``--verbose`` option to ``--verbosity``. Thanks WANG GAOXIANG
The ``recommends_precompute`` method is available even with ``RECOMMENDS_TASK_RUN = False``.
added `celery` and `djcelery` to the test INSTALLED_APPS setting
removed duped statements. Thanks @wgx731
removed useless `if` statements. Thanks @wgx731
bumped up version in preparation for release