Add creational patterns, Interpreter; remove scripts; update README

01-creational/abstract-factory/Application.java

@@ -0,0 +1,21 @@
+package abstractfactory;
+
+/** Client - uses the factory without knowing concrete classes */
+public class Application {
+    private final Button button;
+    private final Checkbox checkbox;
+
+    public Application(GUIFactory factory) {
+        button   = factory.createButton();
+        checkbox = factory.createCheckbox();
+    }
+
+    public void render() {
+        button.render();
+        checkbox.render();
+    }
+
+    public void simulateClick() {
+        button.onClick();
+    }
+}