Red star tablexia icons for builds

desktop/src/cz/nic/tablexia/desktop/DesktopLauncher.java

 package cz.nic.tablexia.desktop;
 
+import com.badlogic.gdx.Files;
 import com.badlogic.gdx.backends.lwjgl.LwjglApplication;
 import com.badlogic.gdx.backends.lwjgl.LwjglApplicationConfiguration;
 import com.jcabi.manifests.Manifests;
@@ -12,17 +13,20 @@ public class DesktopLauncher {
 
     public static final String BUILD_VARIANT_MANIFEST_ATTRIBUTE = "Build-Type";
 
-    public static void main (String[] arg) {
+    public static void main(String[] arg) {
 
         String buildType = null;
         if (Manifests.exists(BUILD_VARIANT_MANIFEST_ATTRIBUTE)) {
             buildType = Manifests.read(BUILD_VARIANT_MANIFEST_ATTRIBUTE);
         }
 
-		LwjglApplicationConfiguration config = new LwjglApplicationConfiguration();
-		config.resizable = true;
-		config.width = 1280;
-		config.height = 800;
-		new LwjglApplication(new Tablexia(buildType, Locale.getDefault()), config);
-	}
+        LwjglApplicationConfiguration config = new LwjglApplicationConfiguration();
+        config.resizable = true;
+        config.width = 1280;
+        config.height = 800;
+
+        config.addIcon("desktop_icon.png", Files.FileType.Internal);
+
+        new LwjglApplication(new Tablexia(buildType, Locale.getDefault()), config);
+    }
 }