Restructure public side of network service.

examples/js/README.md

 JavaScript Mojo Example Applications
 =====================
 
 hello.js, world.js - A minimal application that connects to another.
 
 wget.js - Uses the network service to load a URL.
 
 cube.js - A JS version of examples/sample_app.
 
 --- Running Mojo Applications --- 
@@ skipping 83 matching lines @@
 creates a Shell and assigns it to |this.shell|.
 
 The Shell's connectToService() method returns a "proxy" to a service provided by
 another application.
 
 The JS bindings for a Mojo interface's API are delivered as a JS module whose
 name is based on the '.mojom' file's path. For example, to use the Mojo network
 service you need the JS module based on network_service.mojom:
 
   define("main", [
-    "mojo/services/public/interfaces/network/network_service.mojom",
+    "mojo/services/network/public/interfaces/network_service.mojom",
     "mojo/services/public/js/application",
   ]
     function(netModule, appModule) {
       class MyApplication extends appModule.Application {
         initialize(args) {
           var netService = this.shell.connectToService(
               "mojo:network_service", netModule.NetworkService);
           // Use netService's NetworkService methods.
         }
         ...
@@ skipping 75 matching lines @@
 response parameter. In the EchoString case that would be something like 
 {value: "foo"}.
 
 Similarly, the implementation of a Mojo interface functions that specify a
 response, must return a Promise. The implementation of EchoString() could
 be written like this:
 
   MyEchoStringImpl.prototype.EchoString = function(s) {
     return Promise.resolve({value: s});
   };