MAINT: normalized=True and np.empty in from_dcm
MAINT: normalized=True and np.empty in from_dcm

The `from_dcm` function now passes normalized quaternions to `__init__`
and uses np.empty to initialize `decision_matrix`.

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