Abstracted all block IDs to BlockID and item ids to ItemType. Overloaded recently changed methods for compatibility and cleaned a few things up.

src/main/java/com/sk89q/worldedit/data/BlockData.java

@@ -308,6 +308,17 @@ public final class BlockData {
         return data;
     }
 
+    /**
+     * Flip a block's data value.
+     * 
+     * @param type
+     * @param data
+     * @return
+     */
+    public static int flip(int type, int data) {
+        return rotate90(type, rotate90(type, data));
+    }
+
     /**
      * Flip a block's data value.
      *