Add creational patterns, Interpreter; remove scripts; update README

01-creational/factory-method/EmailService.java

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