Add creational patterns, Interpreter; remove scripts; update README

01-creational/factory-method/NotificationService.java

@@ -0,0 +1,11 @@
+package factorymethod;
+
+/** Creator - declares the factory method */
+public abstract class NotificationService {
+    protected abstract Notification createNotification();
+
+    public void notifyUser(String message) {
+        Notification n = createNotification();
+        n.send(message);
+    }
+}