Fix Triangular Calibration and Add GPIO LED
This update:
- Corrects an issue with triangular calibration. Error in html code resulted in default values being saved instead of new calibration values. Pretty embarrassing :(
- Adds GPIO LED for TESTING ONLY!!! If you try it and it breaks webcontrol, you'll probably need to manually edit webcontrol.json and delete any settings for the LED. I don't think it will break anything, but just warning.. I don't have LEDs connected to mine, so please let me know how it works.