Add itender.ino arduino proxy code

Took 3 hours 32 minutes

arduino/itender/itender.ino

@@ -0,0 +1,14 @@
+/**
+* Official proxy code for iTender GPIO Communication
+**/
+
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(9600);    
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  
+}