added mediator sample

mediator/src/main/java/com/iluwatar/App.java

@@ -0,0 +1,23 @@
+package com.iluwatar;
+
+public class App 
+{
+    public static void main( String[] args )
+    {
+    	Party party = new PartyImpl();
+    	Hobbit hobbit = new Hobbit();
+    	Wizard wizard = new Wizard();
+    	Rogue rogue = new Rogue();
+    	Hunter hunter = new Hunter();
+    	
+    	party.addMember(hobbit);
+    	party.addMember(wizard);
+    	party.addMember(rogue);
+    	party.addMember(hunter);
+    	
+    	hobbit.act(Action.ENEMY);
+    	wizard.act(Action.TALE);
+    	rogue.act(Action.GOLD);
+    	hunter.act(Action.HUNT);
+    }
+}