ticket:1. fix getters in User class
ticket:1. Cut away all working code. Tests should go first.
ticket:1. Added Robolectric test for User class setters. Now fails
ticket:1. Updated .gitignore
ticket:1. setters implementation in User class. Passing successfully test_UserSetters()
ticket:1. UserTest: asserThat replaced with asserEquals
ticket:1. Created test_UserShown() to check that user info present on MainActivity. Fails now
ticket:1. Added implementation for MainActivity methods to show user info. Successfully passing test_UserShown()