Issue #53: Added updateUser to UserService, Added tests testUpdateUser and testUserUpdateWhenUserDoesNotExist to UserServiceUnitTest. Removed ValidationException.
Issue #53: Added to the createUser in UserSerice return value UserCommand. Added to to the testCreateUserWhenThereAreNoUsernameInDatabase in UserServiceUnitTest check the return value. Enabled edit email and disabled edit password in signup.jsp. Fixed createUser, getViewUser, getEditUser and saveUser in UserResource.