Fix movement glitches for actors with low speeds (e.g. a rat).  Was caused by false detection of being stuck.
Actors are moved on if idling near a closed interior door.  Unreachable pathgrid points due to a closed door are removed from the allowed set of points.
Fixed issue where allowed nodes were being erased. PathFinder was returning an empty path if the closest pathgrid point to the start was also the closest pathgrid point to the goal.  Still need to clean up and remove logging statements.
Cleaned up logging statements.
More cleaning up.