Cache behaviour changes. Now a few single-line data cache writeback instructions keep the cache line valid. (JZ4740-specific)
Add back the year in the display of saved state timestamps.

This reverts commit 8ba1b57c67ca3d0d76837163bdf1c4134d383330.
Resynchronise the sound in Pokémon Emerald while keeping it working in Golden Sun 2, etc.

This introduces a change in the saved-state format. It is now 1.0f. Add fixups to support 1.0e.