[Distutils] PyPI Rendering Switched

[Donald Stufft]

I've switched the rendering on PyPI away from using a big blog of code that
was embedded into PyPI to the readme library (https://pypi.python.org/pypi/readme).
Currently this only has a single API (``import readme.rst; readme.rst.render(...)``)
however in the near future I want to provide a CLI for this so people can
more easily test their READMEs against how PyPI renders them.

The only real change should be some slight themeing differences. Some things
might be valid that didn't used to be valid, and certain error conditions will
now render escaped HTML instead of just failing to render.

Note, for the next 24 hours you may need to force refresh your browser.

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Donald Stufft
PGP: 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA