Josh Tynjala

May need to add some kind of touch blocker to avoid triggering buttons and things.

Loosen up the restrictions to support sub-components that aren't Buttons.

Code to reproduce: ``` var container:Sprite = new Sprite(); container.rotation = deg2rad(90); container.x = 100; container.y = 100; this.addChild(container); var input:TextInput = new TextInput(); input.rotation = deg2rad(90); input.text = "Hello...

Uses Keyboard.BACK by default. Should allow any keyboard constant, plus some way to say that no key should close an open drawer. See thread: http://forum.starling-framework.org/topic/prevent-drawer-from-closing-on-hardware-back-button

Needs to use ExclusiveTouch, like other draggable components.

This will make creating a simple layout for LayoutGroup much easier since you only need to implement the layout() function. This should simplify the basic custom layouts tutorial, and a...