[Cython] PyCharm

[mark florisson]

The PyCharm IDE (http://www.jetbrains.com/pycharm/) has granted the
Cython project a free Open Source license, which means that anyone
developing Cython may freely use PyCharm to develop Cython. They
prefer to license to remain unpublic, so if you develop Cython and
want a free PyCharm license, send me an email and I will send you the
license key. It is valid until 13 March 2012.

Cheers,

Mark