[Cython] CEP 513 - Unified Python and Cython namespaces

[Dag Sverre Seljebotn]

I know I said deal with this later, but because it potentially affects 
type parametrization syntax, perhaps deal with a few, small aspects of 
it soon.

Wrote this (I've thought about this for about a month but didn't see a 
need to tell anyone about it until now...):

http://wiki.cython.org/enhancements/unifiednamespace

Dag Sverre