In the referee message ("X has teleported"), give more granular info, such as what method was used (bed, minecart, enderpearl). Also store from/to locations for refs to access via /artp subcommand?

Locations are already stored (/artp -t, I believe), but I can try to give more granular info, definitely. Currently, I'm just hooking the PlayerTeleportEvent, which gives me very little information, but I'm sure I can apply a few heuristics to determine some of the more common teleport types.