MehGravity

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Made structure finding much more efficient, should not lag down your server.
Ability to make exceptions for certain worlds you don't want gravity to be checked in in config.
Gravity checking for The End is now disabled by default.
Added list of weak blocks from Tubelius.
"Weak" blocks will now break as if they were broken by a player which results in the item being dropped on the ground.
Mob spawners keep data when falling.
Command blocks keep data when falling.

Paintings and item frames will drop. This is not a bug because they aren't actual blocks(They are tile entities) so they won't be moved down.
Blocks that don't have a valid spot to sit on will simply drop as an item including all contents in inventory. Not a bug though.
Flower pots drop contents
Sunflowers dupe
Doors on slabs dupe

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