Fixed: helper to generate unique file names
Fixed: .read_by_id
Fixed: reading screen names through :read_by_id
Fixed: Ok model new, Not_Found
Touchups: to quiet down 'ruby -w'
Fixed: :read_by_screen_name. Changed: password -> pass_word
Fixed: :read_by_screen_name_and_pass_word
Fixed: new log in attempt was not merged into .data
Fixed: typo in UTC now