Implemented color swapping

+ swapColor method in Board
+ Button for swapping colors in MainWindow

.classpath

@@ -7,7 +7,7 @@
 			<attribute name="test" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/jdk1.8.0_212">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
 		<attributes>
 			<attribute name="module" value="true"/>
 		</attributes>

src/dev/kske/chess/game/Game.java

@@ -109,5 +109,16 @@ public class Game {
 		players.values().forEach(Player::disconnect);
 	}
 	
+	public void swapColors() {
+		players.values().forEach(Player::cancelMove);
+		Player white = players.get(Color.WHITE);
+		Player black = players.get(Color.BLACK);
+		white.setColor(Color.BLACK);
+		black.setColor(Color.WHITE);
+		players.put(Color.WHITE, black);
+		players.put(Color.BLACK, white);
+		players.get(board.getActiveColor()).requestMove();
+	}
+
 	public Board getBoard() { return board; }
 }

src/dev/kske/chess/ui/MainWindow.java

@@ -67,7 +67,13 @@ public class MainWindow {
 
 		JButton btnRestart = new JButton("Restart");
 		btnRestart.addActionListener((evt) -> { if (game != null) game.reset(); game.start(); });
+		
+		JButton btnSwapColors = new JButton("Swap Colors");
+		btnSwapColors.addActionListener((evt) -> game.swapColors());
+		
 		toolPanel.add(btnRestart);
+		toolPanel.add(btnSwapColors);
+		
 		mframe.pack();
 		mframe.setLocationRelativeTo(null);
 	}

src/dev/kske/chess/ui/MenuBar.java

@@ -59,6 +59,7 @@ public class MenuBar extends JMenuBar {
 		gameMenu.add(aiVsAiMenuItem);
 		gameMenu.add(uciMenuItem);
 		
+
 		add(gameMenu);
 
 		// Start a game