Part 5, take 2: Have Unconditional Branch bits in metadata to tell the Partial Flush operation about the ends of blocks. Split the RAM code cache into IWRAM and EWRAM.

Comment out translation gates in game_config.txt.

(DSTwo-specific) Add statistics on code cache utilisation and flushing.
(DSTwo-specific) Adjust the text for rewinding to reflect the fact that it has been reduced.
Re-enable dead-flag elimination for all code areas.