Fix #4281 - improve kafo output in interactive mode

New highline fixes color output. Also we allow only numbers to specify
answer so the list of allowed options is not that long.
Refs #4281 - Bright and dark background colors

Color scheme can be reused in installer script as well
Refs #4281 - use utf only if supported

We check LANG ENV variable to see whether we can use utf characters.
Merge pull request #74 from ares/fix_highline_questions_mess

Fix highline questions mess