1.2 Update

* GSAP dependency removed
* JQuery dependency removed
* Support for actor hierarchies added
* Support for physics joints added to actors
* Opacity for actors and scenes added
* Actors now support 3D depth property
* Actors now have support for onCreate and onDestroy event handlers
* Actors now support box, circle and polygon shaped fixtures
* Fixtures can now be marked as sensors
* Actors and Scenes can now clip their children against box, circle and
polygon cliopping shapes
* Actors and Scenes now have separate active and visible states
* Actors now have a simple physics system that is used on Actors that
are not under control of Box2D
* Actors can be docked to the edged of the display as well as to the
edges of canvas actors
* Actors can now ignore scene camera movement
* Actors now support onCollisionStart and onCollisionEnd events
* Child actors can now bubble events up to parents
* Scene camera can track actors
* Scenes now support touch panning
* New actor types added:
* ArcActor - Displays arcs / circles
* CanvasActor - A UI actor that can arrange, scroll around and dock its
content
* ParticleActor - An actor that is a particle system
* Polygon Actor - An actor that displays polygon shapes
* RedctActor - An actor that displays rectangle shapes
* Support for timeline key frame based tween animations added
* Support for various types of resources added on a global or scene
local level, including:
* Shapes - Used by clipping and physics systems
* Geometries - Used by rendering system to render geometries
* Brushes - Used to create sprite atlases / bitmap animation
* Sounds - used to play back audio
* Materials - Used to define physics materials
* Full support for the Goji Editor added, including XOML loader