Added a test for aper()
Added a test for aper()

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