DOC: one more stats update, and an update about ndimage wrapping modes.
DOC: one more stats update, and an update about ndimage wrapping modes.

Addresses comments of @chrisb83 and @charris.

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