added composite sample

composite/src/main/java/com/iluwatar/Word.java

@@ -0,0 +1,23 @@
+package com.iluwatar;
+
+import java.util.List;
+
+public class Word extends LetterComposite {
+
+	public Word(List<Letter> letters) {
+		for (Letter l: letters) {
+			this.add(l);
+		}
+	}
+	
+	@Override
+	protected void printThisBefore() {
+		System.out.print(" ");
+	}
+
+	@Override
+	protected void printThisAfter() {
+		// nop
+	}
+
+}