Hardkernel Odroid XU4 3D Model

This provides the ability to show or view a representative model of the Hardkernel/Odroid XU4 ARM processor board. The primary use case for the model is the development of 3d printed cases for the XU4 board. The model generated is *not* suitable for printing.

This leverages v1.1d of the XU4 Model script originally provided by user hominoid on the Hardkernel/Odroid support forum at www.forum.odroid.com. Reference the 'XU4 Model for OpenSCAD' thread at URL https://forum.odroid.com/viewtopic.p