Add LORA gateway

first implementation of a lora gateway integration, tested on ttgo heltec boards with embedded lora module #356
Sending and receiving working

User_config.h

@@ -80,6 +80,7 @@ char mqtt_port[6] = "1883";
 #define ZgatewayRF     "RF"       //ESP8266, Arduino, ESP32
 //#define ZgatewayRF315  "RF315"    //ESP8266, Arduino, ESP32
 #define ZgatewayIR     "IR"       //ESP8266, Arduino,         Sonoff RF Bridge
+//#define ZgatewayLORA   "LORA"       //ESP8266, Arduino, ESP32
 //#define ZgatewayPilight "Pilight" //ESP8266, Arduino, ESP32
 #define ZgatewayBT     "BT"       //ESP8266, Arduino, ESP32
 //#define ZgatewayRF2    "RF2"      //ESP8266, Arduino, ESP32