Add path for EEPROM

[Libbers]

This PR adds a path to your EEPROM in settings. Currently this design forces a user to choose their own EEPROM and will not launch without it. It was discussed on discord that maybe XQEMU should ship with a dummy EEPROM in the future.

Below is a screenshot of the added option, please discuss if something does not look suitable.

This closes #43

[GXTX]

@JayFoxRox

However, we must provide an EEPROM image before this is merged

I disagree, users are already required to provide kernel images, MCPX images and to actually use "the xbox" a valid HDD image. This seems very bikeshey on an already useful patch.

[JayFoxRox]

Agreed. I'll probably fixup the remaining issues (if @kl0wn doesn't do it) and merge it soon.