An extra to execute gcode when a hardware button is pressed or released. Uses the jinja2 templating system.
Inspired by pull request #545 from Miguel Moitinho miguel@moitinho.net and pull request #1098 from Paulo Drugos paulodrugos@gmail.com
Signed-off-by: Alec Plumb <alec@etherwalker.com>
Alec B. Plumb