Configuration files

Do not merge - this is a preliminary PR for discussion.

As of now, incorporates Dolphin's INI code for a configuration system. So far, handles for input controls have been added, but they haven't been hooked yet into the parts of code that use them. 
This could be a map of maps, where the first maps from "section" to a map of entries in that section. The vector is a little messy and slow.