Added webpack, uglifyJS and snapshot to the sdk app (#200)

* chore: Add webpack to the project to enable unglify

* fix(webpack): require main-activity.android (#197)

* fix: require main-activity.android in vendor-platform

* fix: add main-activity.android to native extenders list for snapshot

* chore: update webpack deps

* chore: Rename all 'example' files to include 'page' so that uglify works

* chore: Fix incorrect navigation path when used with uglify

Author: VladimirAmiorkov

sdk/app/app.ts

@@ -1,3 +1,4 @@
+import "./bundle-config";
 import application = require("tns-core-modules/application");
 import fresco = require("nativescript-fresco");
 application.setCssFileName("./app.css");
@@ -24,4 +25,4 @@ if (application.android) {
     });
 }
 
-application.start("./navigation/category-list");
+application.start("./navigation/category-list-page");