Add updateBoard() method to Gui

schach/src/main/java/de/hs_mannheim/informatik/chess/gui/Gui.java

@@ -110,4 +110,12 @@ public class Gui {
         return fields[row][col];
     }
 	
+	public void updateBoard(String[][] unicodeBoard) {
+        for (int row = 0; row < 8; row++) {
+            for (int col = 0; col < 8; col++) {
+                fields[row][col].setText(unicodeBoard[row][col]);
+            }
+        }
+    }
+	
 }