Added a spec to test that the image is actually downloadable.
Added a spec to test that the image is actually downloadable.

refinery/refinerycms,simi/refinerycms,anitagraham/refinerycms,anitagraham/refinerycms,mkaplan9/refinerycms,Retimont/refinerycms,aguzubiaga/refinerycms,trevornez/refinerycms,simi/refinerycms,chrise86/refinerycms,mojarra/myrefinerycms,SmartMedia/refinerycms-with-custom-icons,kappiah/refinerycms,mabras/refinerycms,mkaplan9/refinerycms,KingLemuel/refinerycms,mlinfoot/refinerycms,mobilityhouse/refinerycms,KingLemuel/refinerycms,Retimont/refinerycms,chrise86/refinerycms,Eric-Guo/refinerycms,hoopla-software/refinerycms,LytayTOUCH/refinerycms,trevornez/refinerycms,louim/refinerycms,kappiah/refinerycms,mkaplan9/refinerycms,kelkoo-services/refinerycms,refinery/refinerycms,anitagraham/refinerycms,kappiah/refinerycms,LytayTOUCH/refinerycms,KingLemuel/refinerycms,stefanspicer/refinerycms,gwagener/refinerycms,mojarra/myrefinerycms,stefanspicer/refinerycms,aguzubiaga/refinerycms,aguzubiaga/refinerycms,gwagener/refinerycms,johanb/refinerycms,Eric-Guo/refinerycms,bryanmtl/g-refinerycms,Retimont/refinerycms,mlinfoot/refinerycms,bricesanchez/refinerycms,LytayTOUCH/refinerycms,hoopla-software/refinerycms,refinery/refinerycms,simi/refinerycms,louim/refinerycms,kelkoo-services/refinerycms,stefanspicer/refinerycms,gwagener/refinerycms,bryanmtl/g-refinerycms,mabras/refinerycms,hoopla-software/refinerycms,Eric-Guo/refinerycms,johanb/refinerycms,sideci-sample/sideci-sample-refinerycms,mlinfoot/refinerycms,sideci-sample/sideci-sample-refinerycms,simi/refinerycms,SmartMedia/refinerycms-with-custom-icons,trevornez/refinerycms,mobilityhouse/refinerycms,bricesanchez/refinerycms,johanb/refinerycms,mabras/refinerycms,chrise86/refinerycms