Expose HTTP status message resp.status_msg

[fmoo]

This change adds a new attribute to the Response objects,
status_msg. This typically returns something like "OK"
for 200 responses or "Not Found" for 404 responses.

The status message can provide some additional semantic information
about the response outside of the response body and response headers.

[fmoo]

Is this good? Or should I squash these revisions together?

[kennethreitz]

Sorry for the delay!

I'm torn about adding this in right now. I'm currently working at porting the entire backend of Requests to urllib3. part of that will be to give the response a simple reference to the original httplib response object w/ r.raw. With that, the status_msg will be available.

[fmoo]

Yeah, I saw poster removal was targeting 0.8 and figured this might be good to have for another 0.6 or an 0.7 release in the meantime.

If urllib3 is around the corner and/or the api's (r.raw.status_msg vs. r.status_msg) won't be compatible then you probably shouldn't take this.

[kennethreitz]

Closing, but I'll add you to the contributors list. If the urllib3 integration falls through (doubtful), I'll def add this.