Fox 2: SceneKit WWDC 2017 sample code

Last Revision:	Version 1.3, 2018-04-05 Editorial update. (Full Revision History)
Build Requirements:	Xcode 9 or later
Runtime Requirements:	iOS 11 or later, tvOS 11 or later, macOS 10.13 or later. Fox 2 must be run on a physical device. Fox 2 does not support the iOS Simulator or tvOS Simulator.

This sample code demonstrates SceneKit's new features added in iOS 11, tvOS 11, and macOS 10.13.