Corrected comment about ting_visual_relation_get_cover_url function
Corrected comment about ting_visual_relation_get_cover_url function
Fixed problem with ting_visual_relation_get_cover_url fucntion.
Refactored ting_visual_relation_get_cover_url
Corrected comment about ting_visual_relation_get_cover_url function
Refactored ting_visual_relation_get_ting_object AJAX callback function