add library dependencies
Authentication sequence partially done, displaying Login page in a browser. It is implemented using the MVC pattern: LoginController implemented by Authenticator, LoginView implemented by LoginWebView and LoginModel implemented by Login.
update existing instance from Json methods for Stream and Event implemented in JsonConverter util class. Implementation uses fasterxml's Jackson library to deserialize objects from Json. internal non-primitive fields are deep copied using "cloning" library.
Stream and Event loading structure implementation started.
update Event fetching structure with Callback interface