Add README, bundle phaser.min.js, fix asset paths to be self-contained

index.html

@@ -30,7 +30,7 @@
             #game-container { display: none; }
         }
     </style>
-    <script src="../example/phaser.min.js"></script>
+    <script src="phaser.min.js"></script>
 </head>
 <body>
     <div id="rotate-warning">