updating code structure

example/WebViewBridgeExample/iOS/main.jsbundle

@@ -0,0 +1,8 @@
+// Offline JS
+// To re-generate the offline bundle, run this from the root of your project:
+//
+// $ react-native bundle --minify
+//
+// See http://facebook.github.io/react-native/docs/runningondevice.html for more details.
+
+throw new Error('Offline JS file is empty. See iOS/main.jsbundle for instructions');