Updated TypeScript Readme

Author: clark-stevenson

typescript/readme.md

@@ -9,4 +9,8 @@ Please use TypeScript 1.4+
 
 ## Contributing ##
 
-If you find any mistakes in these definitions or you feel they can be improved in any way, please make a pull request against the dev branch. 
+If you find any mistakes in these definitions or you feel they can be improved in any way, please make a pull request against the dev branch. 
+
+## Note ##
+
+`Creature` and `Box2D` are not yet defined.