Hints themselves have not been tided up
much, but this makes the project of fixing the
hints for each mod a little more manageable
and breaks up the hard-to-navigate single
monolithic hints file in the old guide mod.
The old guide mod has now been completely
retired. Hints are now a full-fledged API-layer
standard feature.
Also reduce client packets by tracking dynalight node
ttl in-memory instead of meta. Lights might flicker out
a bit on area first loading, but some startup judder is
expected on any unloaded area anyway.
Add a "cheat" code for torch testing, and possibly for
other dev uses.
Use the upstream coal textures from the fire mod, since that's
already a dependency, and we can make sure our textures are
consistent with the upstream ones. Make the burning torch tip
look embery and not just coaly.
