Log Message:
Update to 0.4:

0.4 - 2014-05-03
~~~~~~~~~~~~~~~~

* Deprecated ``salt_length`` on
  :class:`~cryptography.hazmat.primitives.asymmetric.padding.MGF1` and added it
  to :class:`~cryptography.hazmat.primitives.asymmetric.padding.PSS`. It will be
  removed from ``MGF1`` in two releases per our :doc:`/api-stability` policy.
* Added :class:`~cryptography.hazmat.primitives.ciphers.algorithms.SEED` support.
* Added :class:`~cryptography.hazmat.primitives.cmac.CMAC`.
* Added decryption support to
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey`
  and encryption support to
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey`.
* Added signature support to
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey`
  and verification support to
  :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey`.

0.3 - 2014-03-27
~~~~~~~~~~~~~~~~

* Added :class:`~cryptography.hazmat.primitives.twofactor.hotp.HOTP`.
* Added :class:`~cryptography.hazmat.primitives.twofactor.totp.TOTP`.
* Added :class:`~cryptography.hazmat.primitives.ciphers.algorithms.IDEA` support.
* Added signature support to
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey`
  and verification support to
  :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey`.
* Moved test vectors to the new ``cryptography_vectors`` package.