Deleting voice commands from channel

Voice commands will now be deletedd from channel after 30 seconds. It happens quite often that the bot gets a voice channel time out if it is used heavily by 2 users. I suspect enqueuePlay to be the cause of that.

README.md

@@ -17,6 +17,6 @@ Typing only the `!command` without an argument results in a random sound of this
 The idea is to be able to have a detailed listing of available sound files in a responsive interface and a simple button to trigger the sound playback in a channel.
 
 ## Known issues
-- None that I know of.  
+- enqueuePlay is not 99% of the time "OK", enqueueing has to be redesigned threadsafe. 
 
 Please use the issue tracker.

main.go

@@ -707,11 +707,23 @@ func onMessageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {
 			}
 
 			go enqueuePlay(m.Author, guild, coll, sound)
+			go deleteCommandMessage(s, m.ChannelID, m.ID)
 			return
 		}
 	}
 }
 
+// Delete the message after a delay so the channel does not get cluttered
+func deleteCommandMessage(s *discordgo.Session, channelID string, messageID string) {
+	time.Sleep(30 * time.Second)
+	err := s.ChannelMessageDelete(channelID, messageID)
+	if err != nil {
+		log.WithFields(log.Fields{
+			"error": err,
+		}).Error("Failed to delete message.")
+	}
+}
+
 func main() {
 	var (
 		Token      = flag.String("t", "", "Discord Authentication Token")