Add backwards-compatibility with Astropy 0.4
Add backwards-compatibility with Astropy 0.4

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