six 1.11.0

[Benjamin Peterson]

It's been a while, but six 1.11.0 is now live on PyPI! six is a Python
2&3 compatibility library.

Many thanks to the various contributors who did most the work.

Here is the changelog for 1.11.0:

- Pull request #178: `with_metaclass` now properly proxies `__prepare__`
to the
  underlying metaclass.

- Pull request #191: Allow `with_metaclass` to work with metaclasses
implemented
  in C.

- Pull request #203: Add parse_http_list and parse_keqv_list to moved
  urllib.request.

- Pull request #172 and issue #171: Add unquote_to_bytes to moved
urllib.parse.

- Pull request #167: Add `six.moves.getoutput`.

- Pull request #80: Add `six.moves.urllib_parse.splitvalue`.

- Pull request #75: Add `six.moves.email_mime_image`.

- Pull request #72: Avoid creating reference cycles through tracebacks
in
  `reraise`.