Manypex

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* Bug fix: Honor installed sys.excepthook in pex teardown.
`RB 1733 <https://rbcommons.com/s/twitter/r/1733>`_

* Bug fix: ``UrllibContext`` used ``replace`` as a keyword argument for ``bytes.decode``
but this only works on Python 3. `Pull Request 46 <https://github.com/pantsbuild/pex/pull/46>`_

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* Bug fix: Fixup string formatting in pex/bin/pex.py to support Python 2.6
`Pull Request 40 <https://github.com/pantsbuild/pex/pull/40>`_

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* Performance improvement: Speed up the best-case scenario of dependency resolution.
`RB 1685 <https://rbcommons.com/s/twitter/r/1685>`_

* Bug fix: Change from ``uuid4().get_hex()`` to ``uuid4().hex`` to maintain Python3
compatibility of pex.common.
`Pull Request 39 <https://github.com/pantsbuild/pex/pull/39>`_

* Bug fix: Actually cache the results of translation. Previously bdist translations
would be created in a temporary directory even if a cache location was specified.
`RB 1666 <https://rbcommons.com/s/twitter/r/1666>`_

* Bug fix: Support all potential abi tag permutations when determining platform
compatibility.
`Pull Request 33 <https://github.com/pantsbuild/pex/pull/33>`_

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* Performance improvement: Don't always write packages to disk if they've already been
cached. This can significantly speed up launching PEX files with a large
number of non-zip-safe dependencies.
`RB 1642 <https://rbcommons.com/s/twitter/r/1642>`_

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* Bug fix: Allow pex 0.8.x to parse pex files produced by earlier versions of
pex and twitter.common.python.

* Pin pex to setuptools prior to 9.x until we have a chance to make changes
related to PEP440 and the change of pkg_resources.py to a package.

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* Bug fix: Fix issue where it'd be possible to ``os.path.getmtime`` on a remote ``Link`` object
`Issue 29 <https://github.com/pantsbuild/pex/issues/29>`_