* Pistons/Ice no longer need to FastSetBlock first (#4600), and the former don't drop items when broken in creative
- Begin migration away from stationary fluids
* Tick the chunk after applying a client's changed
* Broadcast pending blocks at the end of a tick
* WakeUp is for singular changes (block breaking for example). The simulator should check blocks around the position and discover other affected blocks as it sees fit
* AddBlock is for when you know a whole area is to be updated; chunk loading, or area wakeups for example
+ Prepares for correct handling of destroyed blocks after removal of SolidBlockHandler in the redstone simulator
This was mostly done automatically and then visually inspected for obvious errors.
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