Importing and exporting SRAM to and from gnuboy-go save state

[Jukkaaf]

Since the gnuboy-go SRAM is stored within the save state, it would be nice to be able to import and export it so that the player could use the same save on the odroid-go, real hadrware and different emulators.

[OtherCrashOverride]

This was discussed elsewhere in an issue and on the forums. The ODROID-GO hardware is resource constrained. Any import/export will need to be an external tool run on a PC. There are currently no plans (by me) to implement such a tool.