now it can be hooked via following new methods: add_before_get_handler, add_around_get_handler, add_after_get_handler, add_before_put_handler, add_around_put_handler, add_after_put_handler
new callbacks: on_service_shared_storage_get, on_service_shared_storage_put, on_shared_storage_get, on_shared_storage_put
new callback: on_service_controller_method_error
on_service_shared_storage_get and on_service_shared_storage_put a more canonical now
new callbacks: on_service_shared_storage_receives_error_notification and on_shared_storage_receives_error_notification