v0.6.0 - oscilloscope leaf

Working on a battery enabled board, i felt the need to debug the power consumption of my circuit. I started using INA219 breakout connected to an ESP32. So i thought.. why not creating a leaf using the grownode capabilities?
Here it is. A fully integrated solution with monitoring capabilites thanks to telegraf, influxdb and grafana live measurement.
See INA219 leaf and oscilloscope board pages in documentation for details.
Video of the working demo: https://youtu.be/EDo6dCnkoFY

..And of course lot of bug fixing and performance enhancements. See commit log.