DOC: update 1.0 release notes.
DOC: update 1.0 release notes.

Add discrete sine/cosine additions, fix all formatting and textual issues.

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