(they're supposed to be doors, but they don't open/close yet)

(the black and white borders are too thick at 16px)

(intended for traffic signage or similar)

Rework related textures.  Use steel ingots and green, white, black, yellow dyes
to craft.  Can also use "sheet metal" from my fork of Zeg9's steel mod.

each sign type has a separate table which now defines the nodebox
model and position of the text on that model, instead of separate
sets of tables for each.

MUCH more readable background texture for all signs

use exact-to-pixel dimensions on all signs
move sign models to start of signs_lib where they can be seen
make homedecor's brass/iron signs-on-posts use them
adjust all textures accordingly

model by jp, textures by VanessaE

move light switch down to bottom of node

give them selection boxes that are easier to point at

add craft recipe for medicine cabinet, move it to misc-bathroom.lua

also fixed the group settings to make them easier to dig, and gave them
nice, clear inventory images.

also widen the particle size range
makes for a much more varied smoke pattern

Better parameters for smoke particles.

Used and re-licensed with permission of LazyJ and jp:

```
[07-27 10:02] <jp__> Hi Vanessa. I replaced the LazyJ's smokes nodes by few particules : https://forum.minetest.net/viewtopic.php?p=149534#p149534
[07-27 10:03] <jp__> Now I think this mod is mature for integrate Homedecor...

[07-27 10:17] <VanessaE> LazyJ: homedecor is LGPL.  your code is GPL.  by extension so is jp's fork.
[07-27 10:18] <VanessaE> I'd like to include his fork of your mod into homedecor modpack.
[07-27 10:18] <VanessaE> your permission is required :)
[07-27 10:18] <LazyJ> Ok.
[07-27 10:18] <LazyJ> What's the difference between LGPL and GPL? I just go with whatever the original author uses.
[07-27 10:19] <VanessaE> beats the hell out of me exactly except LGPL is supposed to make it easier to use code so-licensed in proprietary projects or something.
[07-27 10:19] <VanessaE> I only use it because minetest_game did and I got some code from there.
[07-27 10:20] <LazyJ> Ok with me to use it.
[07-27 10:21] <LazyJ> Credit to semmett9 too.
```

give slightly more meaningful filenames for their textures

experiment failed.