Added tests for creating comic objects from various dictionaries.
Added tests for creating comic objects from various dictionaries.

mamaral/xkcd-Open-Source,Suninus/xkcd-Open-Source,Suninus/xkcd-Open-Source,IsaacChapman/xkcd-Open-Source,mamaral/xkcd-Open-Source,mamaral/xkcd-Open-Source,IsaacChapman/xkcd-Open-Source,iOSTestApps/xkcd-Open-Source,iOSTestApps/xkcd-Open-Source,IsaacChapman/xkcd-Open-Source