Packaging warning, in via @andrewgross.
Merge pull request #1429 from Lukasa/docs

Packaging warning, in via @andrewgross.
@1434 Fix https://github.com/kennethreitz/requests/issues/1434
Merge pull request #1435 from chinux23/master

@1434 https://github.com/kennethreitz/requests/issues/1434
Fixed wrong method call at streaming example

405 is returned if POST request is performed to http://httpbin.org/stream/20
Merge pull request #1437 from lukaszb/patch-1

Fixed wrong method call at streaming example
Header keys should be native strings.

This commit follows a discussion on IRC. For more information, see the
Pull Request associated with it.
Modify new CID tests to use native string keys.
Instantiate the CID directly.

No need to do this the slow way now. Thanks to Colin (@cdunklau) for the
idea.
Remove merge conflict.