[kubed] rename event processing function
[kubed] introduce a recycle param for the sensor uci entries
[kubed] construct registry from all files in /usr/share/kube/registry
[avr+spid] add sg command to configure the listening group
[spid] send sensor board control commands via ubus iso fifo
[fsync+fbackup+ftest] all scripts use ubus for sensor board comms
[ctrl] no need for a fifo ctrl library anymore
[kubed] toggle listening group when going into pairing mode
[kubed] re-introduce event queue to guarantee fsm run-to-completion