- read_prompt_reply using PromptOptions added to replace the redundant

- read_prompt_reply using PromptOptions added to replace the redundant
  read_action_ari, read_bool answer, and dependency problem prompt
  implementation and to allow easy implementation of other prompts
  (better media change callback, eject)
- description introduced to the Out::prompt() for the initial detailed
  description of the prompt (useful e.g. for the error info before
  a/r/i, or for the user auth prompt).