Added Cython to the dependencies
Added Cython to the dependencies

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