Debian image for the Avenger96 board

Image contents:
 - based on Debian 10 (buster)
 - support for apt repositories
 - kernel version: 4.19.9
 - tf-a, u-boot and kernel origin: https://github.com/dh-electronics/meta-av96/tree/av96_v32
 - WiFi firmware origin: https://github.com/murata-wireless/cyw-fmac-fw
 - no root password
 - no other user than root
 - root can login without password over tty or SSH
 - GUI: weston
 - browser: midori
 - DHCP client on eth0 and wlan0
 - network-manager installed
 - no GPU support, no HW acceleration in weston

Setting up WiFi:
  # nmcli dev wifi rescan
  # nmcli dev wifi list
  # nmcli dev wifi connect <SSID> passphrase <passphrase>

Product homepage:
  https://wiki.dh-electronics.com/index.php/Avenger96