Demo of using SDL 2 from Go Language

Uses package github.com/veandco/go-sdl2/sdl.

Status

• Works as of 2015-Aug-20 on Windows 8.1 when using go1.5beta1 windows/amd64.
• Fails at of 2015-Nov-12 on El Capitan when using go version go1.5.1 darwin/amd64. Symptom is red flashing.