Add creational patterns, Interpreter; remove scripts; update README

01-creational/factory-method/PushNotification.java

@@ -0,0 +1,11 @@
+package factorymethod;
+
+public class PushNotification implements Notification {
+    private final String deviceToken;
+    public PushNotification(String deviceToken) { this.deviceToken = deviceToken; }
+
+    @Override
+    public void send(String message) {
+        System.out.println("Push -> " + deviceToken + ": " + message);
+    }
+}