Modified tree generation and sapling growth calls

to comply with new plantlife API

In addition to that, there have been numerous other, smaller changes:

* Tweaked palm tree model to add coconuts

* Tweaked size of all "fruit" items (really just cones).  Rotated their images
  in inventory and wield.

* Changed descriptions of sideways trunks to "Sideways Xxxx Trunk"

* Tweaked names of jungle tree leaves to be Jungle Tree Leaves (Xxxx)

* Moved jungletree trunk, sideways trunk, sapling into nodedef loop

* Renamed trunks and trunk tops to bear "_trunk" and "_trunk_top" in their
  filenames.

* Added copies of default jungle tree trunks and tops, with naming similar to
  the above change.

* Re-arranged init.lua to put all leaves/needles definitions in one place.

* Deleted some outdated textures.

* combined leaves definitions back into main loop with an exception for
  jungletrees (if that one is called for, it is skipped, because leaves for
  those trees are explicitly defined later)

* Made all leaves drop saplings when dug, 1/20 chance.

* Added leafdecay radii to main tree table but disabled the use of it.  To be
  implemented in the future.  Disabled leaf decay for firs.

1 files changed, 41 insertions, 22 deletions

diff --git a/init.lua b/init.lua
index a05297e..94af930 100644
--- a/init.lua
+++ b/init.lua
@@ -59,10 +59,10 @@ minetest.register_alias("mapgen_leaves", "air")
 plantslib:register_generate_plant(moretrees.beech_biome, moretrees.beech_model)
 ]]--
 
--- sapling growth setup
+-- sapling growth
 
-local sapling_interval = 500    
-local sapling_chance = 10
+local sapling_interval = 1
+local sapling_chance = 1
 
 for i in ipairs(simple_trees) do
 	local tree_name = trees[i][1]
@@ -71,27 +71,46 @@ for i in ipairs(simple_trees) do
 
 	plantslib:dbg(dump(moretrees[tree_biome].surface))
 	
-	plantslib:grow_plants(
-		sapling_interval,
-		sapling_chance,
-		"moretrees:"..tree_name.."_sapling",
-		nil,
-		nil,
-		moretrees[tree_biome].surface,
-		nil,
-		nil,
-		nil,
-		nil,
-		nil,
-		moretrees[tree_model],
-		nil
-	)
+	plantslib:grow_plants({
+		grow_delay = sapling_interval,
+		grow_chance = sapling_chance,
+		grow_plant = "moretrees:"..tree_name.."_sapling",
+		grow_nodes = moretrees[tree_biome].surface,
+		grow_function = moretrees[tree_model],
+	})
 end
 
-plantslib:grow_plants(sapling_interval,sapling_chance,"moretrees:birch_sapling",nil,nil,nil,nil,nil,nil,nil,nil,"moretrees:grow_birch",nil)
-plantslib:grow_plants(sapling_interval,sapling_chance,"moretrees:spruce_sapling",nil,nil,nil,nil,nil,nil,nil,nil,"moretrees:grow_spruce",nil)
-plantslib:grow_plants(sapling_interval,sapling_chance,"moretrees:fir_sapling",nil,nil,nil,nil,nil,nil,nil,nil,"moretrees:grow_fir",nil)
-plantslib:grow_plants(sapling_interval,sapling_chance,"moretrees:jungletree_sapling",nil,nil,nil,nil,nil,nil,nil,nil,"moretrees:grow_jungletree",nil)
+plantslib:grow_plants({
+	grow_delay = sapling_interval,
+	grow_chance = sapling_chance,
+	grow_plant = "moretrees:birch_sapling",
+	grow_nodes = moretrees.birch_biome.surface,
+	grow_function = "moretrees:grow_birch"
+})
+
+plantslib:grow_plants({
+	grow_delay = sapling_interval,
+	grow_chance = sapling_chance,
+	grow_plant = "moretrees:spruce_sapling",
+	grow_nodes = moretrees.spruce_biome.surface,
+	grow_function = "moretrees:grow_spruce"
+})
+
+plantslib:grow_plants({
+	grow_delay = sapling_interval,
+	grow_chance = sapling_chance,
+	grow_plant = "moretrees:fir_sapling",
+	grow_nodes = moretrees.fir_biome.surface,
+	grow_function = "moretrees:grow_fir"
+})
+
+plantslib:grow_plants({
+	grow_delay = sapling_interval,
+	grow_chance = sapling_chance,
+	grow_plant = "moretrees:jungletree_sapling",
+	grow_nodes = moretrees.jungletree_biome.surface,
+	grow_function = "moretrees:grow_jungletree"
+})
 
 -- Code to spawn a birch tree