Minimum Demo'able

• agents have crashing error
• can wifi to laptop as hotspot. Use the new tools/wifi-from-config. does not work, bug in ubuntu/gnome/networkmanager
• Boots into demo mode
• Can wifi to IMET (add config)
• Data goes to adafruit (at least -80 and 1 other thing). NB: systemctl stopped... check topic names
• Does mDNS
• fix fan wiring: 5v/gnd works. no wires?

• Dashboard on AIO (build), or laptop node-red (requires mqtt-broker, config/startup)?

• node-red on laptop can connect to pi mosquitto

--- second (declare victory)

• node-red won't run on Pi zero (requires Pi2 zero)
  • node-red starts, is listening on *. I'm getting "illegal instruction"!
  • Can mDNS to node-red dashboard: build a node-red systemd

• demo/revert button doesn't turn demo back on. doesn't seem to stop agents__startup-demo-mode.py.service