Silence undesirable output when --quiet option is used

[okor]

To address issue #879

Checklist

• Feature branch is up-to-date with master (if not - rebase it).
• Added tests.
• Added an entry to the Changelog if the new
  code introduces user-observable changes.
• Update Readme.md when cli options are changed

[grosser]

this makes sense in general / is a good fix, but I think what we should really do is make all "fluff" go to stderr and only real output go to stdout.

[grosser]

3.12.1