Reorganizing library structure, prep for 2.0.0

drivers/AVR/DigitalIO/examples/testDigitalPin/testDigitalPin.ino

@@ -0,0 +1,19 @@
+// Scope test for write timing of DigitalPin functions.
+#include <DigitalIO.h>
+
+// Class with compile time pin number.
+DigitalPin<13> pin13;
+
+void setup() {
+  // set mode to OUTPUT
+  pin13.mode(OUTPUT);
+}
+void loop() {
+  pin13.high();
+  pin13.low();
+  pin13.write(1);
+  pin13.write(0);
+  pin13.toggle();
+  pin13.toggle();
+  delay(1);
+}