Add 'USB_Mode to Hardware CDC and JTAG' hint and remove frills from examples

example/motion_indicating/motion_indicating.ino

@@ -2,10 +2,8 @@
 Dezibot dezibot = Dezibot(); 
 void setup() {   
     dezibot.begin();
-   Serial.begin(9600); 
 }  
 void loop() {   
-    Serial.println("bla");   
     dezibot.motion.move(1000);   
     dezibot.multiColorLight.setLed(BOTTOM, RED);   
     delay(2000);   
@@ -17,4 +15,4 @@ void loop() {
     delay(2000);   
     dezibot.multiColorLight.turnOffLed();   
     delay(2000); 
-}
+}