Devastation b4

-Expanded bottom floor with new route and zombie spawn exit
-Fixed some clipping issues
-Made some exits easier to exit
-Removed healthammokits

Updated to B2 should appear on the workshop shortly
-Added new route for zombies spawning in the Asbestos room on the upper floor
-Arrows can now be lit by the car fire
-Ammo and Health on the 0 Floor has been reduced
-Ammo and Health on the Bottom floor has been increased
-Added Pyre flames to the cityscape above
-Ambient sounds added

Ditto