Merge branch 'release-0.3' into develop

Conflicts:
	Vocaluxe/Base/CConfig.cs
	Vocaluxe/Lib/Playlist/CPlaylistFile.cs
	Vocaluxe/Screens/CScreenSong.cs
	VocaluxeLib/CHelper.cs
	VocaluxeLib/Menu/CMenu.cs
	VocaluxeLib/Menu/SongMenu/CSongMenuFramework.cs
	VocaluxeLib/Menu/SongMenu/CSongMenuTileBoard.cs

VocaluxeLib/Songs/CCategory.cs

@@ -17,6 +17,7 @@
 
 using System.Collections.Generic;
 using VocaluxeLib.Draw;
+using System.Linq;
 
 namespace VocaluxeLib.Songs
 {
@@ -50,6 +51,11 @@ namespace VocaluxeLib.Songs
             }
         }
 
+        public int GetNumSongsNotSung()
+        {
+            return Songs.Count(sp => !sp.IsSung);
+        }
+
         public CCategory(string name, CTexture coverSmall, CTexture coverBig)
         {
             Name = name;