Added new background-option: SlideShow.

Vocaluxe/Base/CMain.cs

@@ -233,6 +233,16 @@ namespace Vocaluxe.Base
         {
             return CSettings.DataPath;
         }
+
+        public float GetSlideShowImageTime()
+        {
+            return CSettings.SlideShowImageTime;
+        }
+
+        public float GetSlideShowFadeTime()
+        {
+            return CSettings.SlideShowFadeTime;
+        }
     }
 
     class CBtheme : ITheme

Vocaluxe/Base/CSettings.cs

@@ -143,6 +143,9 @@ namespace Vocaluxe.Base
         public const float BackgroundMusicFadeTime = 0.5f;
         public const float PauseResetTime = 1f;
 
+        public const float SlideShowImageTime = 3500f;
+        public const float SlideShowFadeTime = 500f;
+
         public static readonly List<string> MusicFileTypes = new List<string>
             {
                 "*.mp3",