More-itertools

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* Added ``one`` from ``jaraco.util.itertools``. (Thanks, jaraco!)
* Added ``distinct_permutations`` and ``unique_to_each``. (Contributed by
bbayles)
* Added ``windowed``. (Contributed by bbayles, with thanks to buchanae,
jaraco, and abarnert)
* Simplified the implementation of ``chunked``. (Thanks, nvie!)
* Python 3.5 is now supported. Python 2.6 is no longer supported.
* Python 3 is now supported directly; there is no 2to3 step.

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* Added ``iterate`` and ``with_iter``. (Thanks, abarnert!)

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* Added (tested!) implementations of the recipes from the itertools
documentation. (Thanks, Chris Lonnen!)
* Added ``ilen``. (Thanks for the inspiration, Matt Basta!)

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* ``chunked`` now returns lists rather than tuples. After all, they're
homogeneous. This slightly backward-incompatible change is the reason for
the major version bump.
* Added ``consumer``.
* Improved test machinery.

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* Added ``first`` function.
* Added Python 3 support.
* Added a default arg to ``peekable.peek()``.
* Noted how to easily test whether a peekable iterator is exhausted.
* Rewrote documentation.

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* Initial release, with ``collate``, ``peekable``, and ``chunked``. Could
really use better docs.