Log Message:
Update to 2.3.0:

2.3.0 (2014-05-16)
++++++++++++++++++

**API Changes**

- New ``Response`` property ``is_redirect``, which is true when the
  library could have processed this response as a redirection (whether
  or not it actually did).
- The ``timeout`` parameter now affects requests with both ``stream=True`` and
  ``stream=False`` equally.
- The change in v2.0.0 to mandate explicit proxy schemes has been reverted.
  Proxy schemes now default to ``http://``.
- The ``CaseInsensitiveDict`` used for HTTP headers now behaves like a normal
  dictionary when references as string or viewd in the interpreter.

**Bugfixes**

- No longer expose Authorization or Proxy-Authorization headers on redirect.
  Fix CVE-2014-1829 and CVE-2014-1830 respectively.
- Authorization is re-evaluated each redirect.
- On redirect, pass url as native strings.
- Fall-back to autodetected encoding for JSON when Unicode detection fails.
- Headers set to ``None`` on the ``Session`` are now correctly not sent.
- Correctly honor ``decode_unicode`` even if it wasn't used earlier in the same
  response.
- Stop advertising ``compress`` as a supported Content-Encoding.
- The ``Response.history`` parameter is now always a list.
- Many, many ``urllib3`` bugfixes.

2.2.1 (2014-01-23)
++++++++++++++++++

**Bugfixes**

- Fixes incorrect parsing of proxy credentials that contain a literal or encoded \ 
'#' character.
- Assorted urllib3 fixes.