This is just a build from master for the impatient.
This can and will destroy savegames for a few games due to broken save type detection so backup your saves! You have been warned.
Also note that EEPROM savegames from some emulators or even flashcarts are incompatible because they are laid out wrong (every 8 bytes block of data is reversed). This tool can fix that.
In the archive included are 2 builds. One with BIOS intro and one without.