Add column aggregate method
Add column aggregate method

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