------------------
* Allow user to specify a path to the CA bundle which is used for verifying the
server SSL certificate by setting ``CA_CERTS_BUNDLE_PATH`` variable.
* When selecting which CA bundle is used for verifying the server SSL
certificate look for the bundle in some common locations - https://github.com/Kami/python-yubico-client/pull/10
* Drop support for Python 2.5
* Use ``requests`` library for performing HTTP requests and turn SSL cert
verification on by default
* Avoid busy-looping (add ``time.sleep``) when waiting for responses - https://github.com/Kami/python-yubico-client/pull/9
* Allow user to pass in value ``0`` for ``sl`` argument in ``verify`` and
``verify_multi`` method - https://github.com/Kami/python-yubico-client/pull/8
* Throw an exception inside ``verify`` and ``verify_multi`` method if timeout has
occurred or invalid status code is returned - https://github.com/Kami/python-yubico-client/pull/7
* Improve response validation and of included, verify that ``otp`` and ``nonce``
parameters in the response match one provided in the request - https://github.com/Kami/python-yubico-client/pull/7
* Add logging