logging

Fixes #6.

player/player.go

@@ -1,6 +1,12 @@
 // Package player implements data about players outside games.
 package player
 
+import "encoding/hex"
+
 // ID is a unique ID for a player.
 // May just be IPv6 (or IPv4-in-6) of their connection, or a UUID.
 type ID [16]byte
+
+func (id ID) String() string {
+	return hex.EncodeToString(id[:])
+}