Rename Angular2Spa to AngularSpa, plus rephrase "Angular 2" as "Angular" in many places

templates/AngularSpa/ClientApp/boot-client.ts

@@ -0,0 +1,22 @@
+import 'reflect-metadata';
+import 'zone.js';
+import { enableProdMode } from '@angular/core';
+import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
+import { AppModule } from './app/app.module.client';
+
+if (module['hot']) {
+    module['hot'].accept();
+    module['hot'].dispose(() => {
+        // Before restarting the app, we create a new root element and dispose the old one
+        const oldRootElem = document.querySelector('app');
+        const newRootElem = document.createElement('app');
+        oldRootElem.parentNode.insertBefore(newRootElem, oldRootElem);
+        modulePromise.then(appModule => appModule.destroy());
+    });
+} else {
+    enableProdMode();
+}
+
+// Note: @ng-tools/webpack looks for the following expression when performing production
+// builds. Don't change how this line looks, otherwise you may break tree-shaking.
+const modulePromise = platformBrowserDynamic().bootstrapModule(AppModule);