added the class Ghostbehavior random

src/main/java/pacmanGame/GhostBehaviorRandom.java

@@ -0,0 +1,11 @@
+package pacmanGame;
+import java.util.Random;
+public class GhostBehaviorRandom implements GhostBehavior {
+
+	@Override
+	public Vector2 GetDirection(Ghost ghost) {
+	
+		return null;
+	}
+	
+}