Update code excerpts in README.md files (microsoft#201)

* Update README.md

This change updates the README.md of the core-CreateNewComversation sample to reflect changes made in the SurveyTriggerer.cs. The current version of SurveyTriggerer.cs uses IDialogTask instead of IDialogStack, and additionally, the original version contained a typo on line 53: `IDialogStack stack = stack = scope.Resolve<IDialogStack>();`

* Update README.md

Update code featured in README.md to match what's actually currently in the sample

CSharp/core-CreateNewConversation/README.md

@@ -55,8 +55,8 @@ public static async Task StartSurvey(ConversationReference conversationReference
         var botData = scope.Resolve<IBotData>();
         await botData.LoadAsync(token);
 
-        // resolve the dialog stack
-        IDialogStack stack = stack = scope.Resolve<IDialogStack>();
+        // resolve the dialog task
+        IDialogTask task = scope.Resolve<IDialogTask>();
 
         // make a dialog to push on the top of the stack
         var child = scope.Resolve<SurveyDialog>();
@@ -68,10 +68,10 @@ public static async Task StartSurvey(ConversationReference conversationReference
         try
         {
             // put the interrupting dialog on the stack
-            stack.Call(interruption, null);
+            task.Call(interruption, null);
 
             // start running the interrupting dialog
-            await stack.PollAsync(token);
+            await task.PollAsync(token);
         }
         finally
         {

CSharp/core-CustomState/README.md

@@ -37,17 +37,17 @@ protected void Application_Start()
     Uri docDbServiceEndpoint = new Uri(ConfigurationManager.AppSettings["DocumentDbServiceEndpoint"]);
     string docDbEmulatorKey = ConfigurationManager.AppSettings["DocumentDbAuthKey"];
 
-    var builder = new ContainerBuilder();
+    Conversation.UpdateContainer(builder =>
+    {
+        builder.RegisterModule(new AzureModule(Assembly.GetExecutingAssembly()));
 
-    builder.RegisterModule(new AzureModule(Assembly.GetExecutingAssembly()));
+        var store = new DocumentDbBotDataStore(docDbServiceEndpoint, docDbEmulatorKey);
+        builder.Register(c => store)
+            .Keyed<IBotDataStore<BotData>>(AzureModule.Key_DataStore)
+            .AsSelf()
+            .SingleInstance();
 
-    var store = new DocumentDbBotDataStore(docDbServiceEndpoint, docDbEmulatorKey);
-    builder.Register(c => store)
-        .Keyed<IBotDataStore<BotData>>(AzureModule.Key_DataStore)
-        .AsSelf()
-        .SingleInstance();
-
-    builder.Update(Conversation.Container);
+    });
 
     GlobalConfiguration.Configure(WebApiConfig.Register);
 }