All images licenced under CC BY 3.0. Grabbed from game-icons.net
acr.png: https://game-icons.net/1x1/delapouite/contortionist.html
ani.png: https://game-icons.net/1x1/delapouite/cavalry.html
arc.png: https://game-icons.net/1x1/delapouite/spell-book.html
ath.png: https://game-icons.net/1x1/lorc/muscle-up.html
cra.png: https://game-icons.net/1x1/lorc/sword-smithing.html
dec.png: https://game-icons.net/1x1/delapouite/convince.html
dip.png: https://game-icons.net/1x1/delapouite/shaking-hands.html
his.png: https://game-icons.net/1x1/delapouite/backward-time.html
ins.png: https://game-icons.net/1x1/lorc/light-bulb.html
itm.png: https://game-icons.net/1x1/lorc/one-eyed.html
inv.png: https://game-icons.net/1x1/lorc/magnifying-glass.html
lor.png: https://game-icons.net/1x1/lorc/bookmarklet.html
med.png: https://game-icons.net/1x1/delapouite/first-aid-kit.html
nat.png: https://game-icons.net/1x1/delapouite/forest.html
occ.png: https://game-icons.net/1x1/skoll/pentacle.html
prc.png: https://game-icons.net/1x1/lorc/semi-closed-eye.html
prf.png: https://game-icons.net/1x1/lorc/sing.html
per.png: https://game-icons.net/1x1/delapouite/public-speaker.html
rel.png: https://game-icons.net/1x1/lorc/holy-grail.html
soc.png: https://game-icons.net/1x1/delapouite/trumpet-flag.html
slt.png: https://game-icons.net/1x1/lorc/snatch.html
ste.png: https://game-icons.net/1x1/lorc/cloak-dagger.html
sur.png: https://game-icons.net/1x1/delapouite/pyre.html
thi.png: https://game-icons.net/1x1/delapouite/lock-picking.html