Merge frontend repository into app/ subdirectory

app/src/pages/tabs/tabs.ts

@@ -0,0 +1,21 @@
+import { Component } from '@angular/core';
+
+import { GridPage } from '../grid/grid';
+import { InformationPage } from '../information/information';
+import { MessagesPage } from '../messages/messages';
+import { UsersPage } from '../users/users';
+
+@Component({
+  templateUrl: 'tabs.html'
+})
+export class TabsPage {
+
+  tab1Root = GridPage;
+  tab2Root = UsersPage;
+  tab3Root = MessagesPage;
+  tab4Root = InformationPage;
+
+  constructor() {
+
+  }
+}