Updated Cython version to >=0.19 in docs
Updated Cython version to >=0.19 in docs

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