Added a few small details and started on resources...



Added a minimum and max damage variable. Renamed the variable
"selected_icon" to "icon_selected". Changed the digAt object to be
of type /obj/effect instead of its own object. Added in the basic
resources of stone, wood, and bone, as well as their icon file. Gave
wall turfs a 'health' variable intended to be used with digging and
deconstruction. Added the new items onto the map. Added herb, carn,
and omnivore definitions.
Commented throughout with small changes as well...



Renamed walk_delay to step_delay. Added comments as necessary/appropriate
to add. Also renamed 'owned' which is a reference to a player, to
REF_player in a single proc.