Gong Worthy Game: Update 3

Updates, More Structure, More Tests, Almost drawing

So WWDC happened on Monday, which brings Swift 2.0, new unit testing tools, and lots of other new toys. Because I enjoy new toys and having this code be dependent on beta software until iOS 9 ships doesn't break my intended end-of-year schedule. That means I lost an afternoon to fiddling with new tools, but I also now get to brag that my model code has 100% test coverage.

As a start on working on the drawing engine, the first step was learning the basics of SpriteKit, so I took on the Apple tutorial for that. I have a really simple demo test up and running in that, and am working on the math for calculating positions for and drawing the hexagons.