Previously, boat responsiveness varied greatly depending on server
lag and singleplayer / multiplayer.
'dtime' is the time from the last execution of the boat entity
'on step' function, so must multiply acceleration and yaw change.
Retune acceleration, turn rate and drift deceleration.
Make reversed turn only happen with significant backwards speed.
Better pathfinder algorithm, allows tuning the lag spike compensation.
Smoother movement (when it's laggy).
Set the player animation to stand on attach.
Remove driver when they leave.
Only update velocity when it's necessary.
Apples only regrow where they first appear on trees, either on mapgen or when grown from saplings (meaning apples that were placed by players won't regrow).
Once the tree is cut down in full (leaves removed), regrowth will stop.
New apples only grow in daylight, and take the same time as a sapling to grow.
Iron at y = 0 was far too easy to find.
Adjust gold lower region to be twice the depth of highest level, like
all other ores.
Diamond at y = -500 was too easy to progress to.
Make diamond and mese block deeper to create a depth progression from
mese crystal to diamond, to reflect tool progression.
This all creates a satisfying 2^n depth progression, with lower regions
being at twice the depth of highest levels.
Use noises to create a varying mix in coniferous forest biomes:
Areas of large pines only, areas of small pines only, mixed areas.
While also having areas of high and low tree densities.
Saplings grow into large or small pines with equal chance.
Avoid hard-coded player inventory lists.
Expose `bones.player_inventory_lists` for mods to look up or change,
which player inventory lists are being dropped or placed into bones.
Acacia bush: Create a unique form different to normal bush, with more
leaf nodes at top than at base.
Acacia tree: Maximum height increased by 1 node. 2 extra nodes of
height variation.
Jungle tree: Add an extra node of height variation. Y-slices moved
downwards to be more balanced between trunk and branches, makes
branches more common.
Pine tree: Increase maximum height by 1 node. Add an extra node of
height variation.
Update sapling 'on place' protection checks for acacia and pine trees.
