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

Also cleans up global types.

modules/angular2/angular2.ts

@@ -0,0 +1,9 @@
+export * from './change_detection';
+export * from './core';
+export * from './annotations';
+export * from './directives';
+export * from './forms';
+export * from './di';
+export {Observable, EventEmitter} from 'angular2/src/facade/async';
+export * from 'angular2/src/render/api';
+export {DomRenderer, DOCUMENT_TOKEN} from 'angular2/src/render/dom/dom_renderer';