Add triggering of actuator on/off state by button press.

This will enable using button on the gateway to switch any controlled attached actuators/relays when pressed.

Adds the following macros:
- ACTUATOR_ON; 0 or 1, set to the output level of the gpio pin to turn the actuator on.
- ACTUATOR_ONOFF_DEFAULT; ACTUATOR_ON or !ACTUATOR_ON, set to the state desired on reset.
- ACTUATOR_BUTTON_TRIGGER_LEVEL; 0 or 1, set to the sensing level which to detect a button press to change the actuator state.

main/main.ino

@@ -636,6 +636,10 @@ void setup() {
 
   delay(1500);
 
+#ifdef ZactuatorONOFF
+  pinMode(ACTUATOR_ONOFF_GPIO, OUTPUT);
+  digitalWrite(ACTUATOR_ONOFF_GPIO, ACTUATOR_ONOFF_DEFAULT);
+#endif
 #ifdef ZsensorBME280
   setupZsensorBME280();
   modules.add(ZsensorBME280);