A huge change

UPDATE NR1: Now you will no longer have to click "UPDATE GRID" to update
pathfinding everytime you place an object solved this by updating only a
spesific area around the object but i will keep the update grid button
in for a little while longer in case

UPDATE NR 2: You can now place workplaces and houses from the
corresponding menus works like a charm altho the objects does not
recognize if it requires water or not

And a few bug fixes here  and there