[Cython] Wiki cleanup / CEP numbering scheme

[Dag Sverre Seljebotn]

Dag Sverre Seljebotn wrote:
> I'd like to spend an hour or so cleaning up the enhancements page if 
> this (I guess it is not a necessity, but if it should be done anyway 
> then this is a good time). If I get thumbs up for the following I'll get 
> at it.
>   
OK, this is done (not all the spec titles etc. are changed accordingly 
but we'll take that as we go).

Dag Sverre