Copi
Revert "Copi"

This reverts commit fae243395fa1653cd8dc3ca8d6acc55ef6e07f38.

I should have comitted when I did more work. Silly me.
Copied help from "human/emote.dm" to "metroid/emote.dm"

Copied the 'help' emote code to slime emote code, this allows slimes to
know what emotes they can do.