implemented blacklists

app/assets/javascripts/utility.js

@@ -18,4 +18,16 @@
   Danbooru.ajax_stop = function(target) {
     $(target).next("img.wait").remove();
   }
+  
+  Danbooru.is_subset = function(array, subarray) {
+    var all = true;
+    
+    $.each(subarray, function(i, val) {
+      if ($.inArray(val, array) === -1) {
+        all = false;
+      }
+    });
+    
+    return all;
+  }
 })();