Places:
Workplaces are now usable nodes.
Plotmarkers around a building can be scanned and their information stored into current plotmarker.
Slightly optimize plotmarker search.
Occupations:
Add test "priest" occupation definition.
Fix lots of bugs in initialization code.
Spawner:
Add ability to determine occupation name out of surrounding workplaces.
Assign occupation to spawned NPC using simple algorithm.
Others:
Reduce log noise a bit.
Fix some warnings.
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