Added support for GroupsHDU objects
Added support for GroupsHDU objects

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