add method point(int index)

src/main/java/shape/AbstractShape.java

@@ -16,5 +16,8 @@ public abstract  class AbstractShape implements Shape {
     public int pointsCount(){ //nombre total de points
         return points.size();
     }
+     public Point2D point(int index){
+        return points.get(index);
+     }
 
 }