Debug mode

[deniak]

@sideshowbarker mentioned it would be good to have a debug/verbose mode. Each time a rule fails, we have to dig into the code to check what specberus is looking for.
It would be good to display that in the UI as the old pubrules does.

[tripu]

Good idea. Perhaps in this new mode we could dump the JS trace every time an error is caught in the class Specberus…