Convert to MBC30 for the extra SRAM for newbox

[vulcandth]

Need to convert the rom to use MBC30 for the extra SRAM. Then newbox should be adjusted to use 4 pokedb banks. This will required expanding newbox's bank bitflags from 1 bit per 20 slots, to 2 bits per 20 slots (enough bits to cover 4 banks).