CFG: Implemented the GetConfigInfoBlk2 function.

Added a "config" file to the CFG process service (CFG:U), and added a few default blocks to it.

Implemented GetSystemModel and GetModelNintendo2DS
It requires me to include a boost header, potentially pulling in a lot more boost stuff than wanted, and increasing the compile time for this file.
I don't like to use Boost "just because"