Reorganizing library structure, prep for 2.0.0

drivers/AVR/DigitalIO/examples/PinIOBegin/PinIOBegin.ino

@@ -0,0 +1,24 @@
+// Use begin to assign pin numbers.
+// Read pin 12 and write the value to pin 13.
+#include <DigitalIO.h>
+
+// Declare the PinIO instances.
+PinIO readPin;
+PinIO writePin;
+//------------------------------------------------------------------------------
+void setup() {
+  // Assign pin 12 to readPin.
+  readPin.begin(12);
+  
+  // input mode with pull-ups disabled
+  readPin.config(INPUT, LOW);
+
+  // Assign pin 13 to writePin and set mode to output.
+  writePin.begin(13);
+  writePin.mode(OUTPUT);
+}
+//------------------------------------------------------------------------------
+void loop() {
+  // Copy the value read from readPin to writePin.
+  writePin.write(readPin.read());
+}