Tree schematics: Alter jungletree, aspen, pine, appletree

Denser jungletree for darker rainforest:
Highest 'jungletree' nodes now prob 255.
Add a 5th lower branch layer.
Increase lower branch layer y-slice prob to 191.

Aspen:
Extend trunk upwards by 1 node to reduce leafdecay radius to 2.

Pine:
Make lower trunk 1 node longer so that lowest branches are more often
higher off the ground, also to make pines taller.

Appletree:
Make 2 opposite branches prob 255, the other 2 prob 127, to avoid
trees with 1 or 0 branches. Therefore also add random rotation.

mods/default/nodes.lua

@@ -2198,5 +2198,5 @@ default.register_leafdecay({
 default.register_leafdecay({
 	trunks = {"default:aspen_tree"},
 	leaves = {"default:aspen_leaves"},
-	radius = 3,
+	radius = 2,
 })