Speed optimise: Trunk placing, add_pine_needles, add_snow

Add the listring functionality https://github.com/minetest/minetest/commit/c977fbd9288d0e80019554411a2f1885f7760568

Remove line if set to the default of 'true'

Fix bookshelf's allow_metadata_inventory_move (check if item belongs to "book" group instead of checking if it is "default:book")

This change word-wraps text when reading a book.

Used value: 2

Implemented nodes:
- Steel Door: Ignores explosion
- Locked Chest: Ignores explosion
- Fire: Ignores explosion
- TNT: Starts burning
- Burning TNT: Explodes immediately
- Gunpowder: Starts burning
- Burning Gunpowder: Ignores explosion

Default/mapgen: Add mapgen aliases for sandstone brick and sandstone brick stair, to enable sandstone dungeons

dont grow cactus on a lying one

use minetest.get_node 2 times less

do a bit what ShadowNinja wrote

add comment

return true if the plant is set

- Mese glows
- Glass + Mese = Meselamp
- New mese mineral texture

Organise and cleanup code

Register blob ores in mgv6 to replace addDirtGravelBlobs
Combine ores and blobs functions