Dependency Injection Module

[JasperHorn]

I'm really just writing down an idea here, but this is something that I have been thinking about recently.

It would be nice for a main way to use the different Good Suite classes to be dependency injection. It would still be optional to use it yourself, but it does make sense. And it would very much be a nice module to provide on its own as well.

For configurations, I was thinking that perhaps you could define a number of properties that need to be injected before you can run things, so you can give nice error messages. Not sure about that quite yet, but it does sound nice if you ask me.