* Openturf icon fixes and improvements
* more things
* Remove some pointless/bad layering/planing
* yeah well I didn't need this anyways
* Refactor Z mimickry to be at /turf
* more refactoring
* Cleanup, use turf/flags instead of z_mimic_flags
* Fix turf/Entered()
* misc optimizations
* fixes
* Major icon smoothing optimizations
* Speed up boot some more
* Fix AO
* Remove some redundant code
* Tie Z-lights to Z-mimic instead of openturfs
* Fix an opacity issue with no_mutate turfs
* Fix some issues with Z-mimic AO not properly clearing
* Fix some OT->OT changetuf bugs
* Add helpers for changing Z-mimic operational state on turfs
* Fix some merge issues, change how F_CUT smoothhint works a bit.
* indentation
* SSopenturf -> SSzcopy
changes:
Overlays now creates less temporary lists.
Falling no longer queues unsimulated atoms that wouldn't fall anyways (incl. LOs).
Pixel-shifted AO is now cached too.
Changed some references to get_map_cell() to macro equivalents in random maps.
Added smoothing hinting to the icon smoother, allowing for major performance improvements in common cases.
Space initialization no longer involves appearance churn (and is much faster as a result).
changes:
/obj/visual_effect has been repathed to /obj/effect/visual.
Openspace movables will no longer use the space plane when on an openturf mimicing a space turf.
Lights now only update on direction change if your direction actually changed.
Fixed some bad set_dir() procs that were either pointless or that didn't return parent.
Mapped-in or maint dirtier-spawned glowing goo no longer self-deletes after 2 minutes.
Fixed an issue that may have caused some openspace movables to not properly handle direction changes.
changes:
parallax_togs now actually gets read from the database instead of just written. Whoops.
AO on turfs adjacent to AO-deny turfs should no longer consider those turfs as AO neighbors.
changes:
Fastboot now turns off AO.
Removed some unused code from atmospheric machinery init.
Removed global list of all lighting overlays as it was unused.
Lighting now tracks the total number of light sources in the world.
Lighting now tracks the percentage of lighting updates done via. instant updates.
