[Cython] PATCH: new refnanny API

[Dag Sverre Seljebotn]

Lisandro Dalcin wrote:
> Dag, I see you pushed my patch, but the refnanny functions are still
> 'public'... Any good reason for this?
>   
No, that was a slip (I had to merge and didn't notice).

You've obviously got more attention to detail here than me, so feel free 
to push this and other changes on the refnanny yourself if you want to.

Dag Sverre