There are now five bushes in this mod: strawberry, blackberry,
blueberry, raspberry, and gooseberry.

Instead of giving you the fruit, digging a bush now directly gives you
that bush, with a 1/5 chance of getting two.

Craft one bush by itself to turn it into four of the corresponding
fruit.  Craft six of that fruit to get the bush back (this is how it was
before, I opted to keep it that way).

Craft:

- - -
S J S
f f f

That is, two sugar, one jungle grass, and three fruit as before, to get
one raw pie of that fruit.  Cook it as usual.  Heals 2 hearts.

Craft one whole pie by itself to get four slices, each of which heals
1/2 heart.

Craft:

S J S
f f f
f f f

That is, two sugar, one jungle grass, and mix-and-match six fruits to
get two mixed fruit pies.  Cook as usual, craft one to get four slices.

Baskets of pies can be crafted the same as before (craft a basket from
four sticks in a "T" shape, then craft one of those plus three pies of
the desired type).

In addition: some moderate rewriting and re-arranging of the code to
facilitating adding the new objects.

Made the bushes lower-resolution (they were 64px, which made them not
fit in so well into the usual 16px landscape - reduced them to 32px.
Ditto for the basket textures.  Pies are all 16px.

New textures for the pies.

Edited existing textures and added new from "along_shore".
Waterlilies and seaweed spawn ongen.

plants_lib API (in the process, added some reasonable biome controls),
made it able to grow on Undergrowth modpack's dirt/grass with leaves
nodes.

Lilies will be rotated randomly on place, in the same manner as they're
usually generated.

Hold 'sneak' (usually shift) while placing to force them to follow your
facedir instead.

Liles will replace buildable_to nodes when placed, including themselves.
This will cause a loss of lilies if you just keep placing them over and
over, but this is intentional.

node_ownership, glomie's protection mod, and zeg9's protection mod are
accounted for, as are infinite item stacks (e.g. plain creative mode).

Also, compact the waterlily register node calls into a loop.

part of minetest_game

spawned automatically by the default flowers code.

took all other plants out of flora group so they don't get spawned by that
code.

the cause of a weird facedir bug, which was actually the game doing it, not
plants_lib

abms will avoid the defaults and vice-versa, to avoid overgrowth.

default flowers mod handles that now.

abms to account for that (as default flowers are flora=1, not flowers=1).

my flowers mod, and renames it to flowers_plus.

backward-compat aliases, in preparation for a subset of these flowers
being added to "common".

also default debug to false again

oversight in the engine that in turn revealed a bug in my code)

plants_lib/init.lua:83: bad argument #1 to 'getn' (table expected, got nil)

better way to set default biome params, optimized-out some copypasta, thanks
to thexyz for spotting these.