[Pyode-user] Python 3 Patch

[Gilbert R. R. <g.r...@gm...>]

Hi physicist,

I patched PyOde to compile with Cython and Python 3 (appended). I tested 
it somehow with examples/tutorial*.py but I think this won't be enough 
tests ;) I commented all the PyGame and PyOpenGL code out cause they 
aren't available for Python 3.

There is a weird line in my patch in src/mass.pyx. Cause it is my first 
try with Cython and my first "project" with Python 3, I didn't 
investigated it much... maybe I do that when a second error like this 
occurs. It has something to do with string encoding and the difference 
of the types  bytes  and  str.

There was also a recursive import in xode/body.py and xode/geom.py I 
deleted.

Thx for using .pyx files ;)

	Gilbert