Requests

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**API Changes**

- New exception: `ContentDecodingError`. Raised instead of `urllib3`
`DecodeError` exceptions.

**Bugfixes**

- Avoid many many exceptions from the buggy implementation of
`proxy_bypass` on OS X in Python 2.6.
- Avoid crashing when attempting to get authentication credentials
from \~/.netrc when running as a user without a home directory.
- Use the correct pool size for pools of connections to proxies.
- Fix iteration of `CookieJar` objects.
- Ensure that cookies are persisted over redirect.
- Switch back to using chardet, since it has merged with charade.

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- Updated CA Bundle, of course.
- Cookies set on individual Requests through a `Session` (e.g. via
`Session.get()`) are no longer persisted to the `Session`.
- Clean up connections when we hit problems during chunked upload,
rather than leaking them.
- Return connections to the pool when a chunked upload is successful,
rather than leaking it.
- Match the HTTPbis recommendation for HTTP 301 redirects.
- Prevent hanging when using streaming uploads and Digest Auth when a
401 is received.
- Values of headers set by Requests are now always the native string
type.
- Fix previously broken SNI support.
- Fix accessing HTTP proxies using proxy authentication.
- Unencode HTTP Basic usernames and passwords extracted from URLs.
- Support for IP address ranges for no\_proxy environment variable
- Parse headers correctly when users override the default `Host:`
header.
- Avoid munging the URL in case of case-sensitive servers.
- Looser URL handling for non-HTTP/HTTPS urls.
- Accept unicode methods in Python 2.6 and 2.7.
- More resilient cookie handling.
- Make `Response` objects pickleable.
- Actually added MD5-sess to Digest Auth instead of pretending to like
last time.
- Updated internal urllib3.
- Fixed Lukasa's lack of taste.

------------------

- Updated included CA Bundle with new mistrusts and automated process
for the future
- Added MD5-sess to Digest Auth
- Accept per-file headers in multipart file POST messages.
- Fixed: Don't send the full URL on CONNECT messages.
- Fixed: Correctly lowercase a redirect scheme.
- Fixed: Cookies not persisted when set via functional API.
- Fixed: Translate urllib3 ProxyError into a requests ProxyError
derived from ConnectionError.
- Updated internal urllib3 and chardet.

------------------

**API Changes:**

- Keys in the Headers dictionary are now native strings on all Python
versions, i.e. bytestrings on Python 2, unicode on Python 3.
- Proxy URLs now *must* have an explicit scheme. A `MissingSchema`
exception will be raised if they don't.
- Timeouts now apply to read time if `Stream=False`.
- `RequestException` is now a subclass of `IOError`, not
`RuntimeError`.
- Added new method to `PreparedRequest` objects:
`PreparedRequest.copy()`.
- Added new method to `Session` objects: `Session.update_request()`.
This method updates a `Request` object with the data (e.g. cookies)
stored on the `Session`.
- Added new method to `Session` objects: `Session.prepare_request()`.
This method updates and prepares a `Request` object, and returns the
corresponding `PreparedRequest` object.
- Added new method to `HTTPAdapter` objects:
`HTTPAdapter.proxy_headers()`. This should not be called directly,
but improves the subclass interface.
- `httplib.IncompleteRead` exceptions caused by incorrect chunked
encoding will now raise a Requests `ChunkedEncodingError` instead.
- Invalid percent-escape sequences now cause a Requests `InvalidURL`
exception to be raised.
- HTTP 208 no longer uses reason phrase `"im_used"`. Correctly uses
`"already_reported"`.
- HTTP 226 reason added (`"im_used"`).

**Bugfixes:**

- Vastly improved proxy support, including the CONNECT verb. Special
thanks to the many contributors who worked towards this improvement.
- Cookies are now properly managed when 401 authentication responses
are received.
- Chunked encoding fixes.
- Support for mixed case schemes.
- Better handling of streaming downloads.
- Retrieve environment proxies from more locations.
- Minor cookies fixes.
- Improved redirect behaviour.
- Improved streaming behaviour, particularly for compressed data.
- Miscellaneous small Python 3 text encoding bugs.
- `.netrc` no longer overrides explicit auth.
- Cookies set by hooks are now correctly persisted on Sessions.
- Fix problem with cookies that specify port numbers in their host
field.
- `BytesIO` can be used to perform streaming uploads.
- More generous parsing of the `no_proxy` environment variable.
- Non-string objects can be passed in data values alongside files.

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- Simple packaging fix

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- Simple packaging fix