BYOND no longer calls Uncross reliably on stairs, to fix this we switch
to using CheckExit and Bumped. This solution is probably the right way to
do it anyway.
* Yes, all of them.
* Also did a few corrections to redundant New() and broken Destroy() along the way
* Renamed the turf_initializer.initialize() proc to InitializeTurf to avoid confusion.
* Subsumed /area/proc/initialize into /atom/proc/initialize() - Made /area's LateInitialize to get same behavior as before.
* Now they won't try and bump you up to the next z on the "lower" step of the stairway. They also don't directly set `loc` Therefore pulling objects up/down actually works.
* Sets their layer so they won't appear above actual objects and mobs.
* Global procs should start with /proc
* Use to_chat() macro
* Added utility to find all z-levels are connected (transitively adjacent) and utility to test if two levels are connected.
