Include binary installer bitmaps in source distribution
Include binary installer bitmaps in source distribution

Otherwise bdist_wininst and bdist_dmg commands fail when building from the source distribution.
bsipocz/astropy,lpsinger/astropy,pllim/astropy,kelle/astropy,joergdietrich/astropy,joergdietrich/astropy,tbabej/astropy,joergdietrich/astropy,StuartLittlefair/astropy,joergdietrich/astropy,aleksandr-bakanov/astropy,dhomeier/astropy,mhvk/astropy,aleksandr-bakanov/astropy,dhomeier/astropy,funbaker/astropy,pllim/astropy,AustereCuriosity/astropy,funbaker/astropy,lpsinger/astropy,MSeifert04/astropy,larrybradley/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,kelle/astropy,tbabej/astropy,bsipocz/astropy,AustereCuriosity/astropy,mhvk/astropy,kelle/astropy,MSeifert04/astropy,saimn/astropy,AustereCuriosity/astropy,larrybradley/astropy,mhvk/astropy,kelle/astropy,StuartLittlefair/astropy,larrybradley/astropy,aleksandr-bakanov/astropy,AustereCuriosity/astropy,DougBurke/astropy,stargaser/astropy,saimn/astropy,larrybradley/astropy,funbaker/astropy,astropy/astropy,larrybradley/astropy,pllim/astropy,stargaser/astropy,saimn/astropy,saimn/astropy,dhomeier/astropy,dhomeier/astropy,dhomeier/astropy,aleksandr-bakanov/astropy,tbabej/astropy,stargaser/astropy,astropy/astropy,lpsinger/astropy,kelle/astropy,tbabej/astropy,astropy/astropy,MSeifert04/astropy,astropy/astropy,saimn/astropy,StuartLittlefair/astropy,mhvk/astropy,mhvk/astropy,joergdietrich/astropy,DougBurke/astropy,AustereCuriosity/astropy,DougBurke/astropy,MSeifert04/astropy,pllim/astropy,funbaker/astropy,tbabej/astropy,stargaser/astropy,astropy/astropy,DougBurke/astropy,pllim/astropy,lpsinger/astropy,bsipocz/astropy,lpsinger/astropy,bsipocz/astropy