Add creational patterns, Interpreter; remove scripts; update README

01-creational/factory-method/SmsService.java

@@ -0,0 +1,11 @@
+package factorymethod;
+
+public class SmsService extends NotificationService {
+    private final String phone;
+    public SmsService(String phone) { this.phone = phone; }
+
+    @Override
+    protected Notification createNotification() {
+        return new SmsNotification(phone);
+    }
+}