[MacOS/DesktopGL] Initial Port of ShipGame to MonoGame

[CartBlanche]

1. Content.mgcb builds from the stand alone app, but throws error from within VS4Mac.
2. All code compiles.
3. Setting the Content.mgcb build action to None the MacOS app will start up.
4. Use the stand-alone app to create the xnbs and copying them into Content/* folder. Game will now start up, as per video... https://youtu.be/u2L1619XkE8
5. Crashes if you select Single/Multiplayer while trying to load the Reflect effect.