Added led_remote to docs

RF24.h

@@ -440,6 +440,16 @@ public:
   /**@}*/
 };
 
+/**
+ * @example led_remote
+ *
+ * This is an example of how to use the RF24 class to control a remote
+ * bank of LED's using buttons on a remote control.
+ *
+ * Every time the buttons change on the remote, the entire state of
+ * buttons is send to the led board, which displays the state.
+ */
+
 /**
  * @example pingpair.pde
  *