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")

Add groups to registration and use water_bucket group

This change word-wraps text when reading a book.

Uses group “connect_to_raillike”

Improved flowers' registration system - Specific nodeboxes, - Color groups - All datas were put into a table then unpacked for add_simple_flower

Used value: 2

Copy pos before giving it to on_blast because it can modify it; also remove a debug print that had nothing to do here

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