Add jordan4ibanez' better digging animation

Set one or more of these in the config to turn the related option on:

mip_map = 1
anisotropic_filter = 1
bilinear_filter = 1
trilinear_filter = 1

Formspec: Draw images before inventories. Allows to use image as backgro...

Fix a bug in falling code where entities get stuck

Add liquid_renewable property, allow non-renewable liquids.

Make air and ignore drop nothing

Replace pow() with multiplikation to improve speed

Move falling to builtin

Blacklisted characters are: / \

Version 0.4.3-rc0; increase PROTOCOL_VERSION due to backwards-incompatible InventoryList width field

Remove "Unknown inventory identifier" deserialization errors, because they can break forward compatibility

- Don't select blocks for drawing in every frame
- Sort meshbuffers by material before drawing

- You have 2 stacks: a with x items and b with y<x items
- Take a with your mouse and place it on b
- Whole stack a moves to b
- (y * 2 - x) items move from b to a
- (x - y) items are left to the mouse cursor