refactor(ts'ify): ts’ify mocks, directives and test_lib

Also cleans up global types.

modules/angular2/test.ts

@@ -0,0 +1,11 @@
+/**
+ * @module
+ * @public
+ * @description
+ * This module is used for writing tests for applications written in Angular.
+ *
+ * This module is not included in the `angular2` module; you must import the test module explicitly.
+ *
+ */
+export * from './src/test_lib/test_bed';
+export * from './src/test_lib/test_injector';