Helper: ConfigHelper (easier config item handling)

Oh my goodness! This saves me soooo much time!!! Thank you!!

What drives me nuts as someone who is new to scripting for DOpus (as well as in general, a basic programmer) is the lack of explanations in the manual how to do things and examples. Lots of examples. Also it needs consistency. It's like the whole manual just throw stuff at your face and hoped that you just makes sense of it. Anyway, with this, I don't need to suffer trying to add config options and it looks much cleaner too. Once again, thanks!