Progress bar (#293)

* include progress bar

* example script

* small fix

* add progressr suggestion to docs

* added show_progressbar + trying to set default behavior in explain

* man + ::

* .

* Revert "Merge remote-tracking branch 'origin/progress_bar' into progress_bar"

This reverts commit 2974ec9327f73ffc6faef67b9b2b704559a6b10e.

* man

* description bug

Co-authored-by: Martin <jullum@nr.no>