changes:
/obj/effect/list_container/mobl has been replaced with /datum/mobl.
/obj/effect/stop has been removed as it is unused.
/obj/effect/shut_controller has been removed as it is unused.
Uristrunes now cache in SSicon_cache.
Mostly efficiency changes to human icons, little bit of code deduplication in head icons.
The human overlay list has been changed to accept /list so that multiple items can be added to a layer without having to resort to adding overlays to an intermediary object like an /image.
changes:
Human skin color (not tone) is now stored as a hex string instead of a 3-value list.
Human body hair color (resomi only) is now stored as a hex string instead of a 3-value list.
Body markings now play nice with the human icon cache (Fixes#3110)
Hair properly uses its cache now in all cases.
Merged head organs and human icon's implementations of hair icon gen into a proc on human.
Replaced the individual hair and beard caches with a shared composited hair cache used by both head icon and mob icons.
Lists in the human overlay list are now flattened out onto the human, allowing for multiple objects within a single human icon layer without using an intermediary image.
Removed some unused caching lists.
Damage overlays no longer utilize overlays on a blank image for drawing, instead using a list in the human overlay list.
Shoe overlays no longer utilize overlays on the shoe image, instead using a list in the human overlay list.
Surgery overlays no longer utilize overlays on a blank image, instead using a list in the human overlay list.
changes:
Human-type hair (facial & head), eyes, and lips are now cached in SSicon_cache.
Underwear, undershirts, and socks are now cached in SSicon_cache.
Removed forced icon regen for update_body - if this actually did anything, the cache key for these icons needs to be made more detailed.
Organs now fully use SSoverlays to apply overlays (previously they partially used it, which may have caused bugs).
A couple of hair styles (bald, shaved) are pretty common, so this should remove/reduce the overhead of constantly regenerating their icons. Also means that BST's icons only really need to be generated once.
changes:
Body marking icons are now cached in SSicon_cache.
Renamed the body-hair cache (used only by Resomi) to make it more clear what it is.
Humans now use SSoverlay for applying overlays, though they force-compile instead of waiting for it to tick.
Fixed a bug where getFlatIcon() did not work properly with SSoverlay overlays.
changes:
Blood overlays are now cached and do not involve world iteration.
Moved every global icon cache I could find into a new SS for organization & easier debugging. SS does not fire or init.
