Unclear prompt message when asking for trust

[ilesinge]

Currently, when asking for trust of an identity, the prompt is waiting for "true", "false", "t", "f", but it is unclear and not really aligned with common usage. As a user, I personally expect "yes", "no","y","n".

As https://github.com/flatiron/prompt doesn't allow to change the expected boolean input values, a simple solution would be to include explicit instructions (type "true" or "false").
But https://github.com/flatiron/prompt doesn't seem to be maintained, and I could not find a way to prevent the totally unclear error "Invalid input for undefined".

Another solution would be to use https://github.com/SBoudrias/Inquirer.js
It has another advantage in that it makes the questions stand out in a terminal that supports ansi codes:

[hach-que]

Resolved in the dev branch and will be released as part of 0.2.0.