Configuration files

Do not merge - this is a preliminary PR for discussion.

As of now, incorporates ~~Dolphin's INI code~~ SimpleIni 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. 
@neobrain *poke* :) Also, no guarantee that the INI implementation is going to respect comments or whitespace.