MAINT:ENH: Rewrite eigh and add all driver possibilities
MAINT:ENH: Rewrite eigh and add all driver possibilities

endolith/scipy,vigna/scipy,perimosocordiae/scipy,aeklant/scipy,e-q/scipy,scipy/scipy,WarrenWeckesser/scipy,mdhaber/scipy,andyfaff/scipy,WarrenWeckesser/scipy,anntzer/scipy,ilayn/scipy,pizzathief/scipy,person142/scipy,grlee77/scipy,ilayn/scipy,andyfaff/scipy,Eric89GXL/scipy,arokem/scipy,endolith/scipy,e-q/scipy,Stefan-Endres/scipy,matthew-brett/scipy,andyfaff/scipy,mdhaber/scipy,tylerjereddy/scipy,pizzathief/scipy,nmayorov/scipy,tylerjereddy/scipy,andyfaff/scipy,person142/scipy,Eric89GXL/scipy,aeklant/scipy,scipy/scipy,Eric89GXL/scipy,anntzer/scipy,mdhaber/scipy,andyfaff/scipy,matthew-brett/scipy,Eric89GXL/scipy,ilayn/scipy,rgommers/scipy,Eric89GXL/scipy,tylerjereddy/scipy,endolith/scipy,zerothi/scipy,andyfaff/scipy,endolith/scipy,vigna/scipy,matthew-brett/scipy,ilayn/scipy,zerothi/scipy,Eric89GXL/scipy,aeklant/scipy,endolith/scipy,ilayn/scipy,scipy/scipy,aeklant/scipy,matthew-brett/scipy,e-q/scipy,mdhaber/scipy,grlee77/scipy,Stefan-Endres/scipy,tylerjereddy/scipy,Stefan-Endres/scipy,scipy/scipy,pizzathief/scipy,WarrenWeckesser/scipy,aeklant/scipy,arokem/scipy,zerothi/scipy,perimosocordiae/scipy,nmayorov/scipy,Stefan-Endres/scipy,nmayorov/scipy,arokem/scipy,rgommers/scipy,nmayorov/scipy,anntzer/scipy,perimosocordiae/scipy,e-q/scipy,pizzathief/scipy,grlee77/scipy,anntzer/scipy,rgommers/scipy,zerothi/scipy,e-q/scipy,person142/scipy,person142/scipy,ilayn/scipy,zerothi/scipy,matthew-brett/scipy,perimosocordiae/scipy,rgommers/scipy,grlee77/scipy,pizzathief/scipy,arokem/scipy,endolith/scipy,WarrenWeckesser/scipy,Stefan-Endres/scipy,anntzer/scipy,vigna/scipy,mdhaber/scipy,WarrenWeckesser/scipy,perimosocordiae/scipy,zerothi/scipy,mdhaber/scipy,scipy/scipy,scipy/scipy,tylerjereddy/scipy,arokem/scipy,perimosocordiae/scipy,nmayorov/scipy,grlee77/scipy,Stefan-Endres/scipy,rgommers/scipy,vigna/scipy,anntzer/scipy,vigna/scipy,WarrenWeckesser/scipy,person142/scipy