Suggestion: libretro port

[madcock]

Since this already brings together several targets (and doesn't entirely rely on SDL, or X11), it looks like a great project to consider porting to libretro so it could run on the vast number of devices Retroarch supports. While it might be too cumbersome to use its functions as a graphing calculator using the retropad layout (dpad and buttons), it would still allow for access to games and applications that used a small subset of buttons.