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/ZsensorHCSR501.ino

@@ -31,8 +31,8 @@
 #ifdef ZsensorHCSR501
 
 void setupHCSR501() {
-  Log.notice(F("HCSR501 pin: %d" CR), HCSR501_PIN);
-  pinMode(HCSR501_PIN, INPUT); // declare HC SR-501 pin as input
+  Log.notice(F("HCSR501 pin: %d" CR), HCSR501_GPIO);
+  pinMode(HCSR501_GPIO, INPUT); // declare HC SR-501 GPIO as input
 }
 
 void MeasureHCSR501() {
@@ -41,7 +41,7 @@ void MeasureHCSR501() {
     StaticJsonBuffer<JSON_MSG_CALC_BUFFER> jsonBuffer;
     JsonObject& HCSR501data = jsonBuffer.createObject();
     static int pirState = LOW;
-    int PresenceValue = digitalRead(HCSR501_PIN);
+    int PresenceValue = digitalRead(HCSR501_GPIO);
 #  if defined(ESP8266) || defined(ESP32)
     yield();
 #  endif