added 9.0.28 events

std/flash9/events/Event.hx

@@ -38,4 +38,7 @@ extern class Event {
 	static var TAB_ENABLED_CHANGE : String;
 	static var TAB_INDEX_CHANGE : String;
 	static var UNLOAD : String;
+	// player 9.0.28
+	static var ADDED_TO_STAGE : String;
+	static var REMOVED_FROM_STAGE : String;
 }