Group.onDestroy is a new signal that is dispatched whenever the Group is being destroyed. It's dispatched at the start of the destroy process, allowing you to perform any additional house cleaning needed (thanks @jonkelling #1084)
Sprite.updateCrop is available if you wish to update an externally referenced crop rectangle.
Sprites and Images now have their own textures objects, they are no longer references to those stored in the global Pixi.TextureCache. This allows you to redefine the texture frame dynamically without messing up any other Sprites in your game, such as via cropping. They still share global Base Textures, so image references are kept to a minimum.
Sprite.resetFrame will revert the Sprites texture frame back to its defaults dimensions. This is called when you call Sprite.crop with no rectangle, to reset the crop effect, but can be userful in other situations so we've left it as a public method.
InputHandler._setHandCursor private var wasn't properly set, meaning the hand cursor could sometimes remain (during destroy sequence for example)
All Game Objects have a new property: destroyPhase (boolean) which is true if the object is in the process of being destroyed, otherwise false.
The PIXI.AbstractFilter is now included in the Phaser Pixi build by default, allowing for easier use of external Pixi Filters.
Emitter.particleAnchor allows you to control the anchor of emitted Particles. Defaults to 0.5 (same as before) but now under your control.
Emitter now emits Phaser.Particle objects instead of Phaser.Sprites, which can be extended as required.
Emitter has had various local properties removed that were already declared in Phaser.Group which it extends.
ArcadePhysics.Body.reset incorrectly set the Body.rotation to Sprite.rotation instead of angle.
Emitter.emitParticle resets the rotation on the particle to zero before emitting it.
Lots of fixes to the TypeScript definitions file (thanks as always to clark-stevenson for his tireless work on these)
Emitters now bring the particle they are about to emit to the top of the Group before doing so. Avoids particles hidden behind others.
ArcadePhysics.Body.setSize corrected to take the parameters as positive, not negative values.
ArcadePhysics.Body now checks the Sprite scale automatically and adjusts the body size accordingly (fix#608)
Emitter.particleClass can now be set to any object that extends Phaser.Sprite, which will be emitted instead of a regular Sprite.
All the Debug methods have had the word 'render' removed from the start. So where you did `debug.renderSpriteInfo` before, it's now just `debug.spriteInfo`.
Debug methods that rendered geometry (Rectangle, Circle, Line, Point) have been merged into the single method: `Debug.geom`.
Fixed issue where renderOrderID wasn't being assigned correctly, causing the Input Handler to be unable to select the "top" item on a display list (would all default to zero)
Fixed issue where Stage would assign renderOrderIDs in reverse, should be in sequence.
Fixed issue where objects where checking World for the currentRenderOrderID by mistake instead of Stage.
Basically, input handling works a lot better now for Groups and nested objects :)
