Support OTA and model level commands #25

Job	Run time
build (examples/ACUnit)	3m 26s
build (examples/AirQualitySensor/AirQualitySensor)	3m 27s
build (examples/Blinds)	3m 26s
build (examples/ContactSensor)	3m 26s
build (examples/DimSwitch)	3m 26s
build (examples/doorbell)	3m 27s
build (examples/Fan)	3m 26s
build (examples/GarageDoor)	3m 25s
build (examples/Light/Light)	3m 21s
build (examples/Lock/Lock)	3m 13s
build (examples/Lock/Lock_with_feedback)	3m 14s
build (examples/MotionSensor)	3m 17s
build (examples/PowerSensor)	3m 26s
build (examples/Relay/MultiRelays_advance)	3m 24s
build (examples/Relay/Relay)	3m 14s
build (examples/Speaker)	3m 24s
build (examples/Switch/MultiSwitch_advance)	3m 12s
build (examples/Switch/MultiSwitch_beginner)	3m 8s
build (examples/Switch/MultiSwitch_intermediate)	3m 12s
build (examples/Switch/Switch)	3m 11s
build (examples/Thermostat)	1s
build (examples/TV)	1s
	1h 6m 47s

Provide feedback