Added more error handling.

Avoids the segfault issue with the codegen-units = 1.

Handling of GameShark RAM banks differently.
Added parsing integer value errors.

Support for MBC3 and MBC5 in state.
Renamed dumps and loads methods.

Also fixed frame global memory issue in libretro.

This makes it possible to select CBG or DMG mode taking into consideration the CGB flag in the ROM file.

Will allow much better debug.

The code now breaks if pedantic is set and a warning is triggered.

Also avoid problem with processing extra 15th byte of the title for situations where the CGB flag is present.