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

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

Pinetree (by sfan5, from mg mapgen) lua generation and sapling ABM. Add checks for ignore to other trees

use Zeg9`s texture

* Move furnace related code into furnace.lua
* Move duplicated code into functions
* Rewrite ABM:
	* Easier to follow strcuture (no returns in the middle)
	* No unnecessary calls to get_craft_result
	* Split logic and "visual feedback" (a bit)
	* Fewer calls to meta:set and meta:get
	* Better feedback on the current state of the furnace

Original author: @MT-Modder

This adds protection for furnaces (when the area is protected, so it the
furnace).
Also made the codes a bit shorter..

Also, move "waving = 1" property for grasses/shrubs over to default/nodes.lua
and put all instances of this property right under the drawtype, since they
are directly related and depend on the above.