Add Length Tag to songs

VocaluxeLib/Songs/CSong.cs

@@ -130,6 +130,7 @@ namespace VocaluxeLib.Songs
 
         public string Creator = "";
         public string Version = "";
+        public string Length = ""; //Length set in song file, SHOULD match actual song length but is more a hint
         public string Source = "";
         public readonly List<String> UnknownTags = new List<string>();
 
@@ -240,6 +241,7 @@ namespace VocaluxeLib.Songs
 
             Creator = song.Creator;
             Version = song.Version;
+            Length = song.Length;
             Source = song.Source;
             UnknownTags = new List<string>(song.UnknownTags);
 

VocaluxeLib/Songs/CSongLoader.cs

@@ -192,6 +192,9 @@ namespace VocaluxeLib.Songs
                             case "YOUTUBE":
                                 _Song.Source = value;
                                 break;
+                            case "LENGTH":
+                                _Song.Length = value;
+                                break;
                             case "MP3":
                                 if (File.Exists(Path.Combine(_Song.Folder, value)))
                                 {

VocaluxeLib/Songs/CSongWriter.cs

@@ -71,6 +71,7 @@ namespace VocaluxeLib.Songs
                     _WriteHeaderEntry("ENCODING", _Song.Encoding.GetEncodingName());
                 _WriteHeaderEntry("CREATOR", _Song.Creator);
                 _WriteHeaderEntry("VERSION", _Song.Version);
+                _WriteHeaderEntry("LENGTH", _Song.Length);
                 _WriteHeaderEntry("SOURCE", _Song.Source);
                 if (!String.IsNullOrEmpty(_Song._Comment))
                 {