change folder names, remove duplicate DigiJoystick folder

hardware/digistump/avr/libraries/DigisparkCDC/examples/Echo/Echo.ino

@@ -0,0 +1,16 @@
+#include <DigiCDC.h>
+void setup() {                
+  // initialize the digital pin as an output.
+  SerialUSB.begin(); 
+  SerialUSB.println("CDC Test");  
+}
+
+// the loop routine runs over and over again forever:
+void loop() {
+  
+  if (SerialUSB.available()) {
+    SerialUSB.write(SerialUSB.read());
+  }
+  
+   SerialUSB.delay(10);               // keep usb alive // can alos use SerialUSB.refresh();
+}