add config file support

[ITotalJustice]

i think ini is the best option as it's the most simple and most understood by everyone.

this can used to save settings, filepaths for bios.

i think 2 files should be used:

• settings.ini
• history.ini (used for last used roms)

[ITotalJustice]

may use https://github.com/pulzed/mINI