Change default dialog import to named import (#113)

Author: Zedwag

jspm-angularjs/index.js

@@ -3,15 +3,15 @@ import 'devextreme/dist/css/dx.light.css!';
 
 import angular from 'angular';
 import 'devextreme/integration/angular';
-import dialog from 'devextreme/ui/dialog';
+import { alert } from 'devextreme/ui/dialog';
 import 'devextreme/ui/button';
 
 var myApp = angular.module('myApp', ['dx']);
 myApp.controller("myController", function($scope) {
   $scope.buttonOptions = {
     text: "Say 'Hello world'",
     onClick: function() {
-      dialog.alert('Hello world!', '', false);
+      alert('Hello world!', '', false);
     }
   };
 });

jspm-jquery/index.js

@@ -4,11 +4,11 @@ import 'devextreme/dist/css/dx.light.css!';
 import $ from 'jquery';
 import 'devextreme/integration/jquery';
 import 'devextreme/ui/button';
-import dialog from 'devextreme/ui/dialog';
+import { alert } from 'devextreme/ui/dialog';
 
 $("#myButton").dxButton({
   text: "Say 'Hello world'",
   onClick: function() {
-    dialog.alert('Hello world!', '', false);
+    alert('Hello world!', '', false);
   }
 });

jspm-knockout/index.js

@@ -3,14 +3,14 @@ import 'devextreme/dist/css/dx.light.css!';
 
 import ko from 'knockout';
 import 'devextreme/integration/knockout';
-import dialog from 'devextreme/ui/dialog';
+import { alert } from 'devextreme/ui/dialog';
 import 'devextreme/ui/button';
 
 let viewModel = {
   buttonOptions: {
     text: "Say 'Hello world'",
     onClick: function() {
-      dialog.alert('Hello world!', '', false);
+      alert('Hello world!', '', false);
     }
   }
 };