Configuration files

As of now, incorporates ~~Dolphin's INI code~~ SimpleIni for a configuration system.
[QSettings' default constructor](http://qt-project.org/doc/qt-4.8/qsettings.html#QSettings-5)

It's not really ideal to do that, the pointer is what would be technically correct in this situation where `qt_config` should go uninitialized, IMO.