verbose mode - CLI only (N/A to the GUI)

[amagura]

Typically when ZBatt encounters an error it more or less tries to hide it from the user so that they can still enjoy some of the experience of ZBatt. However, sometimes this is not what the user might want, so it would be nice to add an option that would make ZBatt actually print error messages instead of just conveying that something is wrong with an unusual power representation.

[amagura]

I think this should be explored further, however, instead of simply printing error messages, it might be worth adding a --honest option that will prevent zbatt from modifying the power output in anyway at all.