NEP: Add early draft for fixing scalar promotion rules
NEP: Add early draft for fixing scalar promotion rules

Note, this really is a very early draft.  For myself, I have not
even 100% made up my mind that this is actually the best approach.

However, to solicitate feedback and input, I would like to put it
out there (and have a nice rendered version).

For those mainly interested in the possible different approaches
(i.e. making decisions), the "Alternatives" section is probably most
interesting.

Please make a note of blatend errors or unnecessary repitition, but
don't be too surprised if you see them, I will not be surprised if
this needs to be redone from scratch eventually.

mhvk/numpy,mhvk/numpy,charris/numpy,mattip/numpy,pdebuyl/numpy,anntzer/numpy,pdebuyl/numpy,charris/numpy,endolith/numpy,numpy/numpy,pdebuyl/numpy,mattip/numpy,mhvk/numpy,endolith/numpy,numpy/numpy,endolith/numpy,mattip/numpy,charris/numpy,endolith/numpy,pdebuyl/numpy,rgommers/numpy,numpy/numpy,anntzer/numpy,rgommers/numpy,rgommers/numpy,numpy/numpy,rgommers/numpy,charris/numpy,mhvk/numpy,mhvk/numpy,anntzer/numpy,anntzer/numpy,mattip/numpy