update stability badges and descriptions for v1.0
update stability badges and descriptions for v1.0

bsipocz/astropy,larrybradley/astropy,DougBurke/astropy,saimn/astropy,saimn/astropy,pllim/astropy,lpsinger/astropy,AustereCuriosity/astropy,DougBurke/astropy,funbaker/astropy,tbabej/astropy,dhomeier/astropy,astropy/astropy,dhomeier/astropy,StuartLittlefair/astropy,lpsinger/astropy,larrybradley/astropy,joergdietrich/astropy,kelle/astropy,astropy/astropy,DougBurke/astropy,saimn/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,pllim/astropy,saimn/astropy,mhvk/astropy,astropy/astropy,bsipocz/astropy,AustereCuriosity/astropy,larrybradley/astropy,MSeifert04/astropy,funbaker/astropy,lpsinger/astropy,kelle/astropy,kelle/astropy,dhomeier/astropy,joergdietrich/astropy,stargaser/astropy,AustereCuriosity/astropy,aleksandr-bakanov/astropy,AustereCuriosity/astropy,mhvk/astropy,larrybradley/astropy,StuartLittlefair/astropy,joergdietrich/astropy,lpsinger/astropy,aleksandr-bakanov/astropy,pllim/astropy,mhvk/astropy,StuartLittlefair/astropy,kelle/astropy,stargaser/astropy,mhvk/astropy,joergdietrich/astropy,funbaker/astropy,dhomeier/astropy,StuartLittlefair/astropy,tbabej/astropy,MSeifert04/astropy,pllim/astropy,dhomeier/astropy,stargaser/astropy,astropy/astropy,mhvk/astropy,MSeifert04/astropy,StuartLittlefair/astropy,pllim/astropy,lpsinger/astropy,AustereCuriosity/astropy,MSeifert04/astropy,joergdietrich/astropy,kelle/astropy,tbabej/astropy,DougBurke/astropy,tbabej/astropy,stargaser/astropy,funbaker/astropy,tbabej/astropy,larrybradley/astropy,astropy/astropy,saimn/astropy,aleksandr-bakanov/astropy,bsipocz/astropy