Transform villagers to werewolf villagers when struck by lightning.
Re-arrange achievements window.
Reduce lag caused by Vengeance Beams.
Fix Vengeance Spirit death particles always being rendered.
Do not save retrogen info when it is disabled.
So that retrogen can be enabled afterwards without any side-effects of
world already partially blacklisted from being retrogenerated.
Add BM client cache bulk update packets.
All Map's can now be encoded using the PacketCodec.
Also includes an improvement where the client-side cache will be reset
on each world load, just to make sure that values are not mixed up when
swapping servers on going to singleplayer.