Add GuildEmoji function

restapi.go

@@ -1309,6 +1309,19 @@ func (s *Session) GuildAuditLog(guildID, userID, beforeID string, actionType, li
 	return
 }
 
+// GuildEmoji returns all emoji
+// guildID : The ID of a Guild.
+func (s *Session) GuildEmoji(guildID string) (emoji []*Emoji, err error) {
+
+	body, err := s.RequestWithBucketID("GET", EndpointGuildEmojis(guildID), nil, EndpointGuildEmojis(guildID))
+	if err != nil {
+		return
+	}
+
+	err = unmarshal(body, &emoji)
+	return
+}
+
 // GuildEmojiCreate creates a new emoji
 // guildID : The ID of a Guild.
 // name    : The Name of the Emoji.