Change to using importlib in py 3.x as suggested by @astrofrog
Change to using importlib in py 3.x as suggested by @astrofrog

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