Define config paths in fuguta

We were setting config paths when loading them until now.

The problem is we are loading dcmgr.conf from many different places and it's expected paths where copy pasted in all of these. That means every time we make a change to them, we have to track down every single place they're pasted at. Not good. :p

In fact I already found one place that hadn't been updated among them. Now with fuguta 1.0.4, we can just define those in the Fuguta class itself and be done with it.

...

And I also created a Dcmgr::Configurations::Shorthand module to act as some syntax sugar when accessing the configuration :p