let frame attributes that have been added since a SkyCoord was created not raise an AttributeError
let frame attributes that have been added since a SkyCoord was created not raise an AttributeError

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