added getThumbnailURL() default implementation
added getThumbnailURL() default implementation

JarvusInnovations/Emergence-Skeleton,nbey/Emergence-Skeleton,nbey/Emergence-Skeleton,JarvusInnovations/Emergence-Skeleton,nbey/Emergence-Skeleton,JarvusInnovations/Emergence-Skeleton,JarvusInnovations/Emergence-Skeleton,nbey/Emergence-Skeleton