dropbox/responses — pull request #36 by ticosax (2014-10-09 15:18:42+00:00)
Title: allow to use responses as context manager

Hi,
This feature is useful for me, because I only want to catch a subset of my requests calls.
In other word, I still want (for legacy reason) to perform requests calls for real in the context of my test method.

I used `context.mock` but I'm open of better suggestion for the name of the context manager.