Update draw_scent() debug function for configurable view size.
Only return scent values when queried from inside scent update radius to avoid confusing monsters.
Increase scent update radius, only seems to make a difference if you're running.
Revert "Divided up the code into folders, and made appropriate changes to the"

This reverts commit 52b55e1423167df6d3d7a9ab1f230f560e019a57.