Add missing message_level option; update solver docs
Add missing message_level option; update solver docs

endolith/scipy,zerothi/scipy,rgommers/scipy,zerothi/scipy,rgommers/scipy,e-q/scipy,pizzathief/scipy,mdhaber/scipy,scipy/scipy,ilayn/scipy,anntzer/scipy,rgommers/scipy,ilayn/scipy,pizzathief/scipy,zerothi/scipy,perimosocordiae/scipy,Eric89GXL/scipy,WarrenWeckesser/scipy,endolith/scipy,ilayn/scipy,WarrenWeckesser/scipy,nmayorov/scipy,tylerjereddy/scipy,mdhaber/scipy,vigna/scipy,zerothi/scipy,anntzer/scipy,mdhaber/scipy,grlee77/scipy,perimosocordiae/scipy,andyfaff/scipy,WarrenWeckesser/scipy,scipy/scipy,Stefan-Endres/scipy,anntzer/scipy,Stefan-Endres/scipy,Eric89GXL/scipy,endolith/scipy,Eric89GXL/scipy,scipy/scipy,perimosocordiae/scipy,vigna/scipy,anntzer/scipy,matthew-brett/scipy,endolith/scipy,grlee77/scipy,rgommers/scipy,pizzathief/scipy,andyfaff/scipy,Stefan-Endres/scipy,WarrenWeckesser/scipy,e-q/scipy,nmayorov/scipy,e-q/scipy,WarrenWeckesser/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,vigna/scipy,scipy/scipy,Eric89GXL/scipy,ilayn/scipy,e-q/scipy,andyfaff/scipy,pizzathief/scipy,nmayorov/scipy,rgommers/scipy,nmayorov/scipy,tylerjereddy/scipy,scipy/scipy,matthew-brett/scipy,Eric89GXL/scipy,ilayn/scipy,matthew-brett/scipy,matthew-brett/scipy,zerothi/scipy,andyfaff/scipy,tylerjereddy/scipy,mdhaber/scipy,perimosocordiae/scipy,e-q/scipy,WarrenWeckesser/scipy,endolith/scipy,andyfaff/scipy,Eric89GXL/scipy,endolith/scipy,tylerjereddy/scipy,Stefan-Endres/scipy,mdhaber/scipy,zerothi/scipy,grlee77/scipy,vigna/scipy,matthew-brett/scipy,nmayorov/scipy,perimosocordiae/scipy,vigna/scipy,scipy/scipy,grlee77/scipy,pizzathief/scipy,anntzer/scipy,ilayn/scipy,Stefan-Endres/scipy,anntzer/scipy,grlee77/scipy,tylerjereddy/scipy,mdhaber/scipy,andyfaff/scipy