Cython 0.20 release

[Robert Bradshaw]

I'm happy to announce the release of Cython 0.20.

You can download it directly from the Cython site at
http://cython.org/ or from PyPI at
https://pypi.python.org/pypi/Cython/0.20 .

There are a significant number of new features and bug fixes in this
release, for a summary see
https://github.com/cython/cython/blob/8d4d615c49e858fc61663bd3b335ffde593c2840/CHANGES.rst
. Documentation is up at http://docs.cython.org/0.20/.

Many thanks to all those who contributed.

- Robert