The Parallel Toy (up to date with and slightly more recent than The Powder Toy 99.3)

Build 4
	Some performance improvements; sim.threads(1) should now be as fast as single-threaded TPT
	Subframe is broken; this is by design and will not be fixed
	Water equalization hinders multithreading
	Partial frame steps hinder multithreading and are no longer a useful debug tool
	Lua scripts are expected to crash the game, please do not report such issues
