Added reference implementation script

Author: guiweber

example.py

@@ -0,0 +1,9 @@
+import readchar
+
+if __name__ == '__main__':
+    print('start... press q to quit')
+    while 1:
+        k = readchar.readkey()
+        print('you pressed ' + str(k))
+        if k == 'q':
+            break