I should receive feedback about the quality of my password when I sign up

(User Story, Investigate , Priority: High, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Security
Summary: As many systems do, we should probably provide a visual indication of how "good" the password is.
Note the existence of a Scala library to do exactly this. So we would just need to provide a UI in front of that.
I suspect we should forbid passwords that are truly terrible, and provide feedback about ones that are mediocre.