Log Message:
py-responses: updated to 0.16.0

0.16.0
------
* Fixed regression with `stream` parameter deprecation, requests.session() and \ 
cookie handling.
* Replaced adhoc URL parsing with `urllib.parse`.
* Added ``match`` parameter to ``add_callback`` method
* Added `responses.matchers.fragment_identifier_matcher`. This matcher allows you
  to match request URL fragment identifier.
* Improved test coverage.
* Fixed failing test in python 2.7 when `python-future` is also installed.