Allow certain commands to bypass queuing

worldedit-core/src/main/java/com/sk89q/minecraft/util/commands/Command.java

@@ -90,4 +90,10 @@ public @interface Command {
      */
     boolean anyFlags() default false;
 
+    /**
+     * Should the command be queued
+     * @return true if so
+     */
+    boolean queued() default true;
+
 }