Libmc

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- Lots of documentation fixes and other nice things like that.
- Nailed what appears to be the last outstanding memory leak.
- Explicitly require libmemcached 0.32 or newer.

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- Added a ``get_stats`` method, which behaves exactly like
`python-memcached`'s equivalent.
- Gives the empty string for empty memcached values like `python-memcached`
does.
- Added exceptions for most `libmemcached` return codes.
- Fixed an issue with ``Client.behaviors.update``.

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- Pooling helpers are now available. See ``pooling.rst`` in the distribution.
- The binary protocol is now properly exposed, simply pass ``binary=True`` to
the constructor and there you go.
- Call signatures now match `libmemcached` 0.32, but should work with older
versions. Remember to run the tests!

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- Restructured some of the code, which should yield better performance (if not
for that, it reads better.)
- Fixed some memory leaks.
- Integrated changes from `amix.dk`, which should make pylibmc work under
Snow Leopard.
- Add support for the boolean datatype.
- Improved test-runner -- now tests ``build/lib.*/_pylibmc.so`` if available,
and reports some version information.
- Support for x86_64 should now work completely.
- Builds with Python 2.4, tests run fine, but not officially supported.
- Fixed critical bugs in behavior manipulation.

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- Added compatibility with `libmemcached` 0.26, WRT error return codes.
- Added `flush_all` and `disconnect_all` methods.
- Now using the latest pickling protocol.

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- Fixed lots of memory leaks, and added support for `libmemcached` 0.23.
- Also made the code tighter in terms of compiler pedantics.