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/ZsensorGPIOInput.ino

@@ -73,6 +73,12 @@ void MeasureGPIOInput() {
       }
       if (GPIOdata.size() > 0)
         pub(subjectGPIOInputtoMQTT, GPIOdata);
+
+#  ifdef ZactuatorONOFF
+      if (InputState == ACTUATOR_BUTTON_TRIGGER_LEVEL) {
+        ActuatorButtonTrigger();
+      }
+#  endif
     }
   }