Bare feet and other mobs will now make the correct footstep sounds and added new samples to go with them. Added some helpers to is_helpers.dm, mostly for (future) footstep support but maybe someone else can make use of them.
cl Nero1024
soundadd: Bare feet will now make the correct footstep sounds.
soundadd: Other mobs will make the correct footstep sounds.
/cl
As others indicated in the very first footsteps PR other users wanted footstep sounds for barefeet. I also noticed that do_footstep is in a bunch of other mobs, but Ian and Xenomorphs don't wear shoes so I fixed that too.