Fix replacement of default trees so that it works correctly. Beeches
now use default tree nodes, but L-systems models. This redefines the
default tree, wood, leaves, and saplings so that they use moretrees'
textures "Beech" in their descriptions, but only if replacement of
default trees is enabled.
Added backward-compat aliases for this change.
Moved tree replacement mapgen->air aliases to a more logical spot in the
code.
Also, changed out all leaf decay dig_node() calls for nodeupdate(), since the
former calls the latter anyway, and the latter is what does the job.
Increased the palm leaf decay radius to 12.
so we don't need them in moretrees anymore. They're still used by moretrees
to generate out versions of jungletrees, though, and red/green/yellow leaves
are also still provided and defined.
rather than just any trunk being enough to stop just any leaves from decaying.
Re-tuned the leaf decay interval/chance values accordingly. Changed a few
variables to avoid possible conflicts. Added a setting to allow one to disable
the new leaf decay code. Moved sapling growth code into its own file. Minor
changes to comments here and there. Got rid of simple trees list (made the
code do various checks in realtime instead, since it's just startup code
anyway). Fixed messed-up crafting for jungle trees; condensed most of the
crafting code into main craft registry loop. Mostly fixed broken aliases of
default jungletrees.