DOC: ndimage/ccallback: add Numba example and use manual signature in the ctypes one
DOC: ndimage/ccallback: add Numba example and use manual signature in the ctypes one

pbrod/scipy,gfyoung/scipy,scipy/scipy,lhilt/scipy,matthew-brett/scipy,jakevdp/scipy,endolith/scipy,scipy/scipy,mdhaber/scipy,e-q/scipy,rgommers/scipy,anntzer/scipy,tylerjereddy/scipy,jor-/scipy,scipy/scipy,ilayn/scipy,andyfaff/scipy,gfyoung/scipy,pizzathief/scipy,Stefan-Endres/scipy,Stefan-Endres/scipy,WarrenWeckesser/scipy,perimosocordiae/scipy,jamestwebber/scipy,gertingold/scipy,ilayn/scipy,scipy/scipy,apbard/scipy,grlee77/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,andyfaff/scipy,Eric89GXL/scipy,josephcslater/scipy,anntzer/scipy,Stefan-Endres/scipy,tylerjereddy/scipy,anntzer/scipy,pizzathief/scipy,jjhelmus/scipy,gertingold/scipy,rgommers/scipy,rgommers/scipy,endolith/scipy,scipy/scipy,pbrod/scipy,apbard/scipy,aeklant/scipy,mdhaber/scipy,kalvdans/scipy,arokem/scipy,Stefan-Endres/scipy,apbard/scipy,jamestwebber/scipy,vigna/scipy,arokem/scipy,jamestwebber/scipy,grlee77/scipy,kalvdans/scipy,gfyoung/scipy,pizzathief/scipy,pizzathief/scipy,josephcslater/scipy,endolith/scipy,pschella/scipy,ilayn/scipy,e-q/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,jakevdp/scipy,jor-/scipy,e-q/scipy,arokem/scipy,aeklant/scipy,perimosocordiae/scipy,jor-/scipy,zerothi/scipy,Eric89GXL/scipy,gfyoung/scipy,jakevdp/scipy,jamestwebber/scipy,josephcslater/scipy,jjhelmus/scipy,matthew-brett/scipy,zerothi/scipy,e-q/scipy,e-q/scipy,zerothi/scipy,Eric89GXL/scipy,pschella/scipy,person142/scipy,nmayorov/scipy,kalvdans/scipy,dominicelse/scipy,jjhelmus/scipy,jakevdp/scipy,tylerjereddy/scipy,jjhelmus/scipy,befelix/scipy,endolith/scipy,befelix/scipy,rgommers/scipy,mdhaber/scipy,jjhelmus/scipy,befelix/scipy,zerothi/scipy,jamestwebber/scipy,jor-/scipy,vigna/scipy,tylerjereddy/scipy,aarchiba/scipy,pbrod/scipy,matthew-brett/scipy,Eric89GXL/scipy,anntzer/scipy,gertingold/scipy,pbrod/scipy,matthew-brett/scipy,nmayorov/scipy,vigna/scipy,perimosocordiae/scipy,gfyoung/scipy,befelix/scipy,perimosocordiae/scipy,aarchiba/scipy,anntzer/scipy,aarchiba/scipy,kalvdans/scipy,lhilt/scipy,mdhaber/scipy,aarchiba/scipy,vigna/scipy,jor-/scipy,gertingold/scipy,grlee77/scipy,Eric89GXL/scipy,pschella/scipy,dominicelse/scipy,WarrenWeckesser/scipy,ilayn/scipy,mdhaber/scipy,josephcslater/scipy,dominicelse/scipy,apbard/scipy,person142/scipy,andyfaff/scipy,apbard/scipy,nmayorov/scipy,andyfaff/scipy,WarrenWeckesser/scipy,jakevdp/scipy,pschella/scipy,lhilt/scipy,Eric89GXL/scipy,aeklant/scipy,aeklant/scipy,pizzathief/scipy,nmayorov/scipy,person142/scipy,pschella/scipy,ilayn/scipy,Stefan-Endres/scipy,aeklant/scipy,matthew-brett/scipy,lhilt/scipy,grlee77/scipy,josephcslater/scipy,zerothi/scipy,pbrod/scipy,endolith/scipy,vigna/scipy,pbrod/scipy,gertingold/scipy,arokem/scipy,dominicelse/scipy,grlee77/scipy,scipy/scipy,person142/scipy,perimosocordiae/scipy,Stefan-Endres/scipy,lhilt/scipy,person142/scipy,mdhaber/scipy,dominicelse/scipy,arokem/scipy,andyfaff/scipy,befelix/scipy,zerothi/scipy,anntzer/scipy,aarchiba/scipy,endolith/scipy,WarrenWeckesser/scipy,ilayn/scipy,kalvdans/scipy,andyfaff/scipy,rgommers/scipy,nmayorov/scipy