Revert "Removed unused file 'message.h'"

This reverts commit d042a9d572.

zone/CMakeLists.txt

@@ -164,6 +164,7 @@ SET(zone_headers
 	lua_spell.h
 	map.h
 	masterentity.h
+	message.h
 	merc.h
 	mob.h
 	net.h

zone/message.h

@@ -0,0 +1,7 @@
+struct Msg {
+	int		id;
+	char*	Sender;
+	char*	Subject;
+	char*	Body;
+	char*	Date;
+};