Completely rewrite pulling & refactor a bit of multi-z movement #629

Icon difference rendering

Please file any issues here.

Icons with diff:

MODIFIED - icons/hud/screen_gen.dmi (0)

State Name (duplicate)	Old Icon	New Icon	Status
disarm/kill1 (0)			Deleted
disarm/kill (0)			Deleted
reinforce1 (0)			Created
kill (0)			Created
kill1 (0)			Created
reinforce			Modified
!reinforce			Modified

ADDED - goon/icons/items/grab.dmi (0)

State Name (duplicate)	Old Icon	New Icon	Status
2 (0)			Created
1 (0)			Created
pin (0)			Created
pinf (0)			Created
3 (0)			Created

ADDED - icons/hud/screen1.dmi (0)

State Name (duplicate)	Old Icon	New Icon	Status
(0)			Created
internal0 (0)			Created
internal1 (0)			Created
internal2 (0)			Created
fire0 (0)			Created
fire1 (0)			Created
oxy0 (0)			Created
tox0 (0)			Created
tox1 (0)			Created
health0old (0)			Created
health1 (0)			Created
health2 (0)			Created
health3 (0)			Created
health4 (0)			Created
health5 (0)			Created
health6 (0)			Created
health7 (0)			Created
black (0)			Created
blackanimate (0)			Created
temp0 (0)			Created
temp1 (0)			Created
temp2 (0)			Created
temp3 (0)			Created
temp4 (0)			Created
temp-1 (0)			Created
temp-2 (0)			Created
temp-3 (0)			Created
temp-4 (0)			Created
block (0)			Created
x (0)			Created
x2 (0)			Created
x3 (0)			Created
arrow (0)			Created
blank (0)			Created
blank (1)			Created
flash (0)			Created
e_flash (0)			Created
selector (0)			Created
dither50 (0)			Created
blurry (0)			Created
grabbed (0)			Created
spell (0)			Created
grabbed1 (0)			Created
grabbed+1 (0)			Created
!reinforce (0)			Created
reinforce (0)			Created
reinforce1 (0)			Created
kill (0)			Created
kill1 (0)			Created
dark128 (0)			Created
dark64 (0)			Created
dark32 (0)			Created
druggy (0)			Created
noise (0)			Created
filler (0)			Created
blocked (0)			Created
s_arrow (0)			Created
decoline (0)			Created
health0 (0)			Created
health_numb (0)			Created
temp_numb (0)			Created
BETA (0)			Created
facing (0)			Created
creeping (0)			Created
walking (0)			Created
running (0)			Created
act_throw_on (0)			Created
facingOLD (0)			Created
walkingOLD (0)			Created
runningOLD (0)			Created
harm (0)			Created
help (0)			Created
disarm (0)			Created
grab (0)			Created
intent (0)			Created
move (0)			Created
act_resist (0)			Created
sleep0 (0)			Created
rest0 (0)			Created
sleep1 (0)			Created
rest1 (0)			Created
other (0)			Created
pull0 (0)			Created
pull1 (0)			Created
act_throw_off (0)			Created
act_drop (0)			Created
act_hand (0)			Created
hand (0)			Created
pull1b (0)			Created
pull0b (0)			Created
pocket (0)			Created
gloves (0)			Created
shoes (0)			Created
glasses (0)			Created
ears (0)			Created
hair (0)			Created
belt (0)			Created
center (0)			Created
equip (0)			Created
nutrition0 (0)			Created
nutrition1 (0)			Created
nutrition2 (0)			Created
nutrition3 (0)			Created
nutrition4 (0)			Created
pressure0 (0)			Created
pressure-1 (0)			Created
pressure-2 (0)			Created
pressure1 (0)			Created
pressure2 (0)			Created
oxy1 (0)			Created
zone_sel (0)			Created
no_walk1 (0)			Created
no_walk0 (0)			Created
no_item0 (0)			Created
no_item1 (0)			Created
no_run0 (0)			Created
no_run1 (0)			Created
no_radio1 (0)			Created
no_radio0 (0)			Created
gun0 (0)			Created
gun1 (0)			Created
storage_start (0)			Created
storage_continue (0)			Created
storage_end (0)			Created
stored_start (0)			Created
stored_continue (0)			Created
stored_end (0)			Created