Subsectors now have lists of neighbours, for quicker lookup (hopefully)
Added a dedicated pathfinder class. Now it does breadth-first search for several goals.
* Added a short quit out of canPass if both subsectors use the same metasector
* Made it so the breadth-first search DOES check for canPass
* Removed obsolete BSP index from temp lines
* Made BotMap::pointInSubsector const
* PODCollection::makeEmpty now has the option not to zero the content
* Replaced the old AutoWolf-style pathfinder with a better, more compact one
* Now the bot can follow teleporters in its pathfinding
* Work on the deep searching technique; currently not working.