DOC:  Updated the toolchain roadmap based on reviewer comments.
DOC:  Updated the toolchain roadmap based on reviewer comments.

Fixed some version numbers.
Added additional references.
Reformatted to stay under 80 characters per line (where possible).
Updated the BLAS/LAPACK description.

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