Can remove planks from barricades and reclaim them. They will retain health in between uses.
Various zombie spotting chances changed. A player not moving inside a building will never be seen by a zombie from outside, they just don't have the cognitive ability to pick them out through a window, and higher floors the chances diminish too since they tend to look ahead.
Sounds in buildings are muffled so don't travel as far outside.
Some horde balancing / fixes.
Some aiming tweaks.
Reduced footstep range slightly.
Zombie spotted music will not play if the zombies are miles away or many floors below you.
Made the horde prefer outdoor locations and generally ignore doors without any stimulus from inside. They will on occasion disregard this inclination, to keep you on your toes. After all if a zombie starts thumping he'll attract attention from others.
Bug meaning scratches were 100% infection fixed.
Removed accidentally left in 'debug shotgun shells'.
