tictactoe: added ShowGUI class for testing new gui

src/main/java/de/tims/tictactoe/ShowGUI.java

@@ -0,0 +1,22 @@
+package de.tims.tictactoe;
+
+import javax.swing.JFrame;
+
+public class ShowGUI {
+
+	private JFrame frame;
+	
+	public ShowGUI() {
+		this.frame = new JFrame("TicTacToe");
+		this.frame.setSize(600, 600);
+		
+		GameLogic game = new GameLogic(3);
+		this.frame.add(game.generateGUI());
+		this.frame.setVisible(true);
+	}
+	
+	public static void main(String[] args) {
+		new ShowGUI();
+	}
+
+}