Move example out to its own folder
Rip out custom color stuff, use Base.print_with_color

Apart from code reuse, this should work cross-platform.
Downside: you need to run tests with julia --color to get the coloured output
Upshot: Now more garbled escape codes in test logs on PkgEvaluator

@ssfrr I know you looked at this in https://github.com/JuliaLang/julia/issues/8096,
so tagging you in case this interests you
Update README