Code was re-factored accordingly to using GenericDAO interface with CRUD functionality.
User profile and mechanism of his editing  were added.
Merge branch 'master' of https://github.com/kverchi/fixMe
Generics for DAO were added. All connected code changes were made.
Profile and functionality of it editing  were added.
Process of friends/requests loading was optimized.(They are loaded by one SQL query in List<User> instead plural SQL queries targeted on getting single User object by Id)