This is a backwards-incompatible change that will store headers
as a list rather than a dictionary. The reason being that you can
have multiple values for a single header, and concatenating them
together with commas can create an unparseable string (sometimes
the header values can have commas in them)
`responses_of` replaces `response_of`, since each request can have
several matching responses now.
This breaks backwards compatibility if you are using the
response_of method, so a version bump will be required.
I wasn't emulating the stateful file-object in my response stub,
so urllib3 wasn't decompressing gzipped bodies properly. This
should fix that problem.
Thanks @bryanhelmig for the motivation to dig into this.
This commit changes the whole core internal flow of requests.
Now, requests are actually physically made lazily when a response
is requested. This allows the entire request to be sent at once.
Otherwise, it would be impossible to compare whether requests have
already been recorded, since httplib.send() allows you to effectively
stream requests over HTTP.
This refactoring includes some PEP-8 compliance changes, as well as some more
complete testing to ensure that we're in fact serving everything out of
cassettes when we thing we are.
Incidentally, it also includes fixes for #3 and #4
