WIP: Deprecate all the callbacks, SignonIdentity is now a GInitable and GAsyncInitable class
First work toward the new API, prettify the API and align it with the future common DBus API. Proposed to get some suggestions before I continue.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
First work toward the new API, prettify the API and align it with the future common DBus API. Proposed to get some suggestions before I continue.