add IRutils for hexadecimal reading of IR results for ESP8266

ZgatewayIR.ino

@@ -31,6 +31,7 @@
   #include <IRremoteESP8266.h>
   #include <IRsend.h>  // Needed if you want to send IR commands.
   #include <IRrecv.h>  // Needed if you want to receive IR commands.
+  #include <IRutils.h>
   #ifdef DumpMode // in dump mode we increase the size of the buffer to catch big codes
     IRrecv irrecv(IR_RECEIVER_PIN, 1024, 15U, true);
   #else