This is the Official engine version 0.1.5.

o The Stage now keeps track of the tick count and passes it to the update method
  of Scene. There is a new Stage.tick property which tells you what the current
  tick is. The tick counts the number of frame updates, which run at a set
  interval (30 fps unless you change the code).
o The Scene now takes a tick count and passes it to the update method of Actor
o The Actor now takes a tick count and does nothing with it

This is the Official engine version 0.1.4

o enhance the rendering API to allow for stroked shapes
o enhance the polygon API to allow for more complex polygons

This is the Official engine version 0.1.3

o Add properties to allow access to actor width and height

This is the Official engine version 0.1.2

o Include key codes for number keys
o Make all methods in all classes that don't return a value explicitely say that
  they return void.

This is the Official engine version 0.1.1.

 o The Scene and Stage class now use KeyboardEvent and MouseEvent instead of
   Event
 o The mouse input handlers now return a boolean that indicates if default
   handling should be disabled or not
 o The Point class can return an array version of itself and set itself from
   such an array
 o The Renderer interface specifies an interface for more easily rendering an
   arbitrary polygon, and CanvasRenderer implements it.

This is the  Official engine version 0.1.0

This represents the initial TypeScript port of the engine with no other
modifications.