Add support for annotations

For instance:

```php
class StuffController extends Controller
{
    /**
     * @Invalidate({
     *   routes={"route1", "route2", "route3"},
     *   paths={"/bla/bla", "/bla/bla/bla"}
     *   tags={"tag1"}
     * })
     */
    public function updateStuffAction($id, Request $request)
    {
       // ...
    }
}
```