Development 3 build 3

Changes

HassOS Core

• Update Hass.io Supervisor (#431) @pvizeli

RaspberryPi

• RaspberryPi 4 (#428) @pvizeli
• Update bootloader RPi (#427) @pvizeli
• Raspberry Pi Kernel 4.19 (#426) @pvizeli

Hardkernel

• Odroid xu4 updates (#425) @rbray89

Documentation

• Update ova.md (#423) @rbrenton