use updated rangy.js from bower

bower.json

@@ -27,6 +27,7 @@
     "modalBox": "~1.0.2",
     "reconnectingWebsocket": "",
     "diff-dom": "~2.0.0",
-    "marked": "~0.3.5"
+    "marked": "~0.3.5",
+    "rangy": "rangy-release#~1.3.0"
   }
 }