added webpack to demo

Author: PeterStaev

demo/app/App_Resources/Android/app.gradle

@@ -8,7 +8,7 @@
 android {  
   defaultConfig {  
     generatedDensities = []
-    applicationId = "__PACKAGE__"  
+    applicationId = "com.tangrainc.reportingdemo"  
   }  
   aaptOptions {  
     additionalParameters "--no-version-vectors"  

demo/app/vendor-platform.android.ts

@@ -0,0 +1,9 @@
+require("application");
+if (!global["__snapshot"]) {
+    // In case snapshot generation is enabled these modules will get into the bundle
+    // but will not be required/evaluated.
+    // The snapshot webpack plugin will add them to the tns-java-classes.js bundle file.
+    // This way, they will be evaluated on app start as early as possible.
+    require("ui/frame");
+    require("ui/frame/activity");
+}

demo/app/vendor-platform.ios.ts

@@ -0,0 +1,3 @@
+// There is a bug in angular: https://github.com/angular/angular-cli/pull/8589/files
+// Legendary stuff, its webpack plugin pretty much doesn't work with empty TypeScript files in v1.8.3
+void 0;

demo/app/vendor.ts

@@ -0,0 +1,10 @@
+// Snapshot the ~/app.css and the theme
+const application = require("application");
+require("ui/styling/style-scope");
+const appCssContext = require.context("~/", false, /^\.\/app\.(css|scss|less|sass)$/);
+global.registerWebpackModules(appCssContext);
+application.loadAppCss();
+
+require("./vendor-platform");
+
+require("bundle-entry-points");