No need to remove data-src attributes

Better comment string also

js/main.js

@@ -183,9 +183,8 @@
 				});
 
 				$("img[data-src]", nnm).each(function(i, el){
-					// Replace data-src attribute with src attribute for every image
+					// Add src attribute for images with a data-src attribute
 					$(el).attr('src', $(el).data("src"));
-					$(el).removeAttr("data-src");
 				});
 			}