* For non-assoc lists every value was being read as a string. For vars like "access_req" this is bad - it doesn't work. Therefore we add support for lists of numbers.
* While I'm here, might as well add support for non-string keys of associative lists too, since that's required by things like vending machines.
* to_chat() replacement.
* Revert calling target.init_dir() before connecting.
* This change was added in https://github.com/PolarisSS13/Polaris/pull/3775 to counteract `dir` not being set prior to New() for dynamically loaded maps. The root cause was /atom/New() not calling _preloader.load(). Undoing the change now that /atom/New() is fixed.
* The addition of the init_dir() proc itself however, is useful, because there ARE other times some atmos machinery will want to re-initialize its dir, specifically whenever it is rotated.
* init_dir() must be called in the constructor of all atmospherics machines capable of connecting to another. Since it has to happen for ALL machines, lets move that call to /obj/machinery/atmospherics/New()
* Rename /obj/machinery/atmospherics initialize() to atmos_init()
* These days `initialize()` is used to handle general object initialization that is moved outside of New(). The node connection discovery of atmos machinery needs to happen after all that, and so needs to be in a separate proc.
* Make sure to actually call atmos_init during system startup.
Mostly ports /tg/'s method of seeding submaps into specific z-levels.
Due to the low number of submaps present, all of the PoIs are guaranteed to spawn. As more are added, this should fix itself.
Also fixes various bugs with surface tiles, hopefully.
Adds some documentation to the map file system.
Adds a new 'plane' map, ideal for testing PoIs by loading them manually.
Makes space heaters glow orange.
Adds a new grille type for fancy surface windows.
Adds self planting hydro trays/dirts if a seed is on top of them when the map is loaded.
