Syntax: SPLIT <silver> <gold>
SPLIT splits some coins between you and all the members of your
GROUP WHO are in the same room as you. It's customary to SPLIT
the loot after a kill. The first argument is the amount of silver
the SPLIT (0 is acceptable), and the second GOLD (optional).
SPLIT 30 --> SPLIT 30 silver
SPLIT 20 50 --> SPLIT 20 silver, 50 gold
SPLIT 0 10 --> SPLIT 10 gold