Add note on push and pull affine transformations
Add note on push and pull affine transformations

Closes gh-9328
gertingold/scipy,jor-/scipy,andyfaff/scipy,e-q/scipy,WarrenWeckesser/scipy,Eric89GXL/scipy,Eric89GXL/scipy,grlee77/scipy,perimosocordiae/scipy,mdhaber/scipy,person142/scipy,Stefan-Endres/scipy,anntzer/scipy,tylerjereddy/scipy,nmayorov/scipy,rgommers/scipy,person142/scipy,endolith/scipy,rgommers/scipy,aeklant/scipy,matthew-brett/scipy,aarchiba/scipy,Stefan-Endres/scipy,scipy/scipy,pizzathief/scipy,rgommers/scipy,rgommers/scipy,andyfaff/scipy,ilayn/scipy,anntzer/scipy,jor-/scipy,gertingold/scipy,grlee77/scipy,zerothi/scipy,jamestwebber/scipy,andyfaff/scipy,endolith/scipy,vigna/scipy,Eric89GXL/scipy,grlee77/scipy,gertingold/scipy,zerothi/scipy,Stefan-Endres/scipy,andyfaff/scipy,Eric89GXL/scipy,e-q/scipy,zerothi/scipy,Stefan-Endres/scipy,zerothi/scipy,ilayn/scipy,zerothi/scipy,endolith/scipy,grlee77/scipy,ilayn/scipy,mdhaber/scipy,ilayn/scipy,scipy/scipy,endolith/scipy,pizzathief/scipy,perimosocordiae/scipy,lhilt/scipy,arokem/scipy,matthew-brett/scipy,WarrenWeckesser/scipy,jamestwebber/scipy,aarchiba/scipy,vigna/scipy,nmayorov/scipy,endolith/scipy,perimosocordiae/scipy,e-q/scipy,anntzer/scipy,ilayn/scipy,rgommers/scipy,Eric89GXL/scipy,gertingold/scipy,aarchiba/scipy,scipy/scipy,jamestwebber/scipy,scipy/scipy,scipy/scipy,vigna/scipy,matthew-brett/scipy,matthew-brett/scipy,Stefan-Endres/scipy,aarchiba/scipy,WarrenWeckesser/scipy,aarchiba/scipy,perimosocordiae/scipy,vigna/scipy,pizzathief/scipy,jamestwebber/scipy,lhilt/scipy,jor-/scipy,jamestwebber/scipy,tylerjereddy/scipy,lhilt/scipy,arokem/scipy,Eric89GXL/scipy,endolith/scipy,andyfaff/scipy,perimosocordiae/scipy,mdhaber/scipy,lhilt/scipy,grlee77/scipy,pizzathief/scipy,nmayorov/scipy,mdhaber/scipy,person142/scipy,perimosocordiae/scipy,gertingold/scipy,tylerjereddy/scipy,lhilt/scipy,tylerjereddy/scipy,zerothi/scipy,arokem/scipy,aeklant/scipy,arokem/scipy,anntzer/scipy,WarrenWeckesser/scipy,tylerjereddy/scipy,vigna/scipy,arokem/scipy,anntzer/scipy,anntzer/scipy,mdhaber/scipy,matthew-brett/scipy,person142/scipy,jor-/scipy,Stefan-Endres/scipy,aeklant/scipy,mdhaber/scipy,WarrenWeckesser/scipy,person142/scipy,aeklant/scipy,pizzathief/scipy,aeklant/scipy,jor-/scipy,e-q/scipy,WarrenWeckesser/scipy,scipy/scipy,e-q/scipy,nmayorov/scipy,andyfaff/scipy,nmayorov/scipy,ilayn/scipy