use RPIO instead of RPi.GPIO

[Bluscream]

https://pypi.org/project/RPIO/

RPIO is an advanced GPIO module for the Raspberry Pi.

PWM via DMA (up to 1µs resolution)

GPIO input and output (drop-in replacement for RPi.GPIO)

GPIO interrupts (callbacks when events occur on input gpios)

TCP socket interrupts (callbacks when tcp socket clients send data)

Command-line tools rpio and rpio-curses

Well documented, fast source code with minimal CPU usage

Open source (LGPLv3+)