[Cython] ANN: Pyrex 0.9.8.3

Pyrex 0.9.8.3 is now available:

   http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

Compiling multiple .pyx files in one go works properly now, and
can be substantially faster if you have a lot of modules that
cimport from each other. I had to rearrange various things to
make this work, so I hope I haven't broken anything.

The compatibility rules for nogil function pointers have
been fixed, so you can assign a nogil function to a function
pointer that isn't declared nogil (but not the other way around).

Plus a few other bug fixes listed in CHANGES.


What is Pyrex?
--------------

Pyrex is a language for writing Python extension modules.
It lets you freely mix operations on Python and C data, with
all Python reference counting and error checking handled
automatically.