added visuals for cherry in VisualizerPlainText

src/main/java/pacmanGame/VisualizerPlainText.java

@@ -11,6 +11,7 @@ public class VisualizerPlainText implements Visualizer {
 	    this.put("empty", "  ");
 	    this.put("dot", ". ");
 	    this.put("wall", "[]");
+	    this.put("cherry", "OO");
 	}};
 	
 	public final String ghostSprite = "AA";