Change [Frontend]: frontend run as separate stream, sessionid stored in form (temporary)
Add [MessageSystem]: System allow software modules communicate with each other. For example Frontend that running as separate thread can send and get info from AccountService (running like a thread also)
Improve [Frontend]: use Message system. Name required for authorisation. Hardcoded available values now is Jeka and Mell. User session stored in form now (temporary solution ofc. Jetty sessions will be used for).