Replace pin by gpio (#631)

* replace _PIN by _GPIO

* add mention about the goal of -all binaries

* [breaking] change json key from "pin" to "gpio" for actuatorONOFF

main/ZsensorDHT.ino

@@ -33,13 +33,13 @@
 #  include <DHT.h>
 #  include <DHT_U.h>
 
-DHT dht(DHT_RECEIVER_PIN, DHT_SENSOR_TYPE);
+DHT dht(DHT_RECEIVER_GPIO, DHT_SENSOR_TYPE);
 
 //Time used to wait for an interval before resending temp and hum
 unsigned long timedht = 0;
 
 void setupDHT() {
-  Log.notice(F("Reading DHT on pin: %d" CR), DHT_RECEIVER_PIN);
+  Log.notice(F("Reading DHT on pin: %d" CR), DHT_RECEIVER_GPIO);
 }
 
 void MeasureTempAndHum() {