[Cython] Pure python mode

[Robert Kern]

Robert Bradshaw wrote:
> I polished off some more of the pure python mode stuff tonight. I  
> just pushed it to cython-devel. Now you can do stuff like:
> 
>> import cython  # you need a single file to be in your path to use  
>> it in pure Python mode, provided (and installed) with Cython

Hmm, does this cause a problem on systems with case-insensitive files? cython.py 
and Cython/ won't actually conflict on the filesystem, but I suspect the import 
mechanism may get confused.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco