Change the acknowledgment to be Home assistant compatible

#29 Instead of returning acknowledgement as a string to a subtopic
return the pauload to a defined topic in user_config.h

User_config.h

@@ -60,16 +60,17 @@ CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFT
 #define GatewayAnnouncementMsg "hello broker!"
 // global MQTT subject listened by the gateway to execute commands (send RF, IR or others)
 #define subjectMQTTtoX "home/commands/#"
-#define subjectAck "/ack"
 
 //433Mhz MQTT Subjects and keys
 #define subjectMQTTto433 "home/commands/MQTTto433"
 #define subject433toMQTT "home/433toMQTT"
+#define subjectGTWRFtoMQTT "home/433toMQTT"
 #define subject433toMQTTAdvanced "home/433toMQTTAdvanced"
 #define RFprotocolKey "433_" // protocol will be defined if a subject contains RFprotocolKey followed by a value of 1 digit
 #define RFpulselengthKey "PLSL_" // pulselength will be defined if a subject contains RFprotocolKey followed by a value of 3 digits
 //IR MQTT Subjects
 #define subjectIRtoMQTT "home/sensors/ir"
+#define subjectGTWIRtoMQTT "home/sensors/ir"
 #define subjectMQTTtoIR "home/commands/MQTTtoIR"
 /*
 RF supported protocols