Update minimum Sphinx version to 1.2.1
Update minimum Sphinx version to 1.2.1

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