added example of copying coordinates at @cdeil's suggestion
added example of copying coordinates at @cdeil's suggestion

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