- Re-added .qap / .queueautoplay

- Several strings and commands related to music have been changed
  - Changed .ms / .movesong to .tm / .trackmove but kept old aliases
  - Changed ~~song~~ -> 	rack throughout music module strings
- Updated CHANGELOG.md

src/NadekoBot/Db/Models/MusicSettings.cs

@@ -38,6 +38,11 @@ public class MusicPlayerSettings
     ///     Selected quality preset for the music player
     /// </summary>
     public QualityPreset QualityPreset { get; set; }
+
+    /// <summary>
+    ///     Whether the bot will automatically queue related songs
+    /// </summary>
+    public bool AutoPlay { get; set; }
 }
 
 public enum QualityPreset