refactor: move angular source to /packages rather than modules/@angular

packages/compiler/src/resource_loader.ts

@@ -0,0 +1,15 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+/**
+ * An interface for retrieving documents by URL that the compiler uses
+ * to load templates.
+ */
+export class ResourceLoader {
+  get(url: string): Promise<string> { return null; }
+}