Feature Request: Different error messages for SciUnit/NeuronUnit vs SciDash/Geppetto errors.

[rgerkin]

I would like to be able to quickly tell if the error is in my code or the site's. If the exception is raised inside of SciUnit or NeuronUnit, can we color the error message that gets printed on the site blue instead of red? Then I know what I should be debugging myself vs. handing off to you.