#2867 - Added a check to parent theme for comments_template before loading plugin template

#2867
taxonomy class fix

I don't see any reason for attributes or shipping classes to be hierarchical. Removing that, allows us to query ```$taxonomies = get_object_taxonomies($post_type->name, 'objects');
					foreach($taxonomies as $tax) {
						if($tax->hierarchical == true) {// 'Product Categories'}```