NEP: Add proposal for oindex and vindex.
NEP: Add proposal for oindex and vindex.

[ci-skip]

mhvk/numpy,pbrod/numpy,pdebuyl/numpy,abalkin/numpy,endolith/numpy,WarrenWeckesser/numpy,ahaldane/numpy,rgommers/numpy,anntzer/numpy,mhvk/numpy,anntzer/numpy,jorisvandenbossche/numpy,madphysicist/numpy,ahaldane/numpy,pizzathief/numpy,jakirkham/numpy,numpy/numpy,mattip/numpy,gfyoung/numpy,charris/numpy,charris/numpy,shoyer/numpy,madphysicist/numpy,gfyoung/numpy,anntzer/numpy,grlee77/numpy,ahaldane/numpy,jorisvandenbossche/numpy,jakirkham/numpy,jorisvandenbossche/numpy,simongibbons/numpy,charris/numpy,seberg/numpy,mhvk/numpy,pdebuyl/numpy,jakirkham/numpy,pbrod/numpy,shoyer/numpy,MSeifert04/numpy,jakirkham/numpy,seberg/numpy,pdebuyl/numpy,numpy/numpy,numpy/numpy,pizzathief/numpy,jorisvandenbossche/numpy,shoyer/numpy,endolith/numpy,shoyer/numpy,gfyoung/numpy,MSeifert04/numpy,madphysicist/numpy,shoyer/numpy,pizzathief/numpy,grlee77/numpy,abalkin/numpy,WarrenWeckesser/numpy,grlee77/numpy,madphysicist/numpy,simongibbons/numpy,grlee77/numpy,endolith/numpy,grlee77/numpy,simongibbons/numpy,WarrenWeckesser/numpy,WarrenWeckesser/numpy,pizzathief/numpy,MSeifert04/numpy,pdebuyl/numpy,jorisvandenbossche/numpy,rgommers/numpy,ahaldane/numpy,pbrod/numpy,mattip/numpy,MSeifert04/numpy,seberg/numpy,anntzer/numpy,pbrod/numpy,rgommers/numpy,mattip/numpy,WarrenWeckesser/numpy,abalkin/numpy,jakirkham/numpy,rgommers/numpy,mhvk/numpy,MSeifert04/numpy,simongibbons/numpy,endolith/numpy,madphysicist/numpy,pizzathief/numpy,seberg/numpy,ahaldane/numpy,mattip/numpy,mhvk/numpy,simongibbons/numpy,charris/numpy,numpy/numpy,pbrod/numpy