Savestates don't carry over mob aggro

[ScribbleTAS]

Nor does the Velocity of Entities (Falling Blocks, Boats) and more Stuff.. This might actually require a full Serialization of the whole World and Server

[ScribbleTAS]

Well, 5 years later, a bunch of work on savestates has been done already, now I can't procrastinate this one any longer... It's time to fix this