Remove empty lines from Songs (causes problems otherwise!)

Compatibility reading mode for songs with 0-based lengths
Give Lines as an enumerable instead of creating an array

VocaluxeLib/Songs/CNotes.cs

@@ -70,9 +70,9 @@ namespace VocaluxeLib.Songs
             VoiceNames = new CVoiceNames(notes.VoiceNames);
         }
 
-        public CVoice[] Voices
+        public IEnumerable<CVoice> Voices
         {
-            get { return _Voices.ToArray(); }
+            get { return _Voices; }
         }
 
         public int VoiceCount