Fixes#3063Fixes#3064
Makes the asteroid area equivalent to the space area: cannot be powered with an APC, an APC cannot be placed there, and blueprints will allow you to create new areas there. Also tick checks a blueprint proc which caused the lag in the first place, just for future reference.
changes:
Fixes copy_contents_to not working.
Fixes elevators attempting to spawn roofs when it didn't really make sense.
Minor efficiency tweaks in move_contents_to and elevators.
Modifies baseturf to be used instead of not used. Now all functions that used to call "get_base_turf_by_area(T)" will now call "T.baseturf". Turfs that do not have a baseturf defined will set their baseturf to be the result of "get_base_turf_by_area()", which will descend into "get_base_turf_by_z" and ultimately into "turf/space", if none of the previous stages catch.
ChangeTurf will now only keep baseturf persistent from father to child if the child has no baseturf set by code.
This allows for special turfs, such as ceilings, to have their own base turf, such as open space, to be used instead of the area/z baseturf.
Fixes#2763
Rewrites the area movement code used by shuttles & elevators in an effort to make it faster, more extensible, and generally easier to read. Also fixes some bugs relating to lighting & moving areas, such as lighting overlays suddenly being teleported into space for absolutely no reason.
Fixes#2161.
Fixes#2166.
