Added a new function to convert SkyCoord to pixel coordinates
Added a new function to convert SkyCoord to pixel coordinates

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