Log Message:
0.7.0 (2014-09-07)
^^^^^^^^^^^^^^^^^^

- Fixed errors in code examples.
- Fixed ``TypeError`` when using ``between`` validator with ``datetime`` objects
  like in the code example.
- Changed validators to always return ``True`` instead of a truthy object when
  the validation succeeds.
- Fixed ``truthy`` validator to work like it's name suggests. Previously it
  worked like ``falsy``.