Added `.auth` module with password `encrypt()` and `verify()` functions.
(n.b.: This introduces a dependency on [passlib](http://pypi.python.org/pypi/passlib/), which atm requires a `python setup.py install` from source to work under Python 3).
0.3
Not secure
Remove the ``BaseView`` class and the method selecting functionality, as it just doesn't work with Pyramid's view configuration.
Re-factored the CSRF validation into a subscriber as a consequence.
0.2.1
Not secure
Fixed the `.i18n.add_underscore_translation` subscriber.