Update README.md

Author: MitkoVtori

OOP/README.md

@@ -4,3 +4,7 @@
 | ------------------------ |
 | <a href="1.First Steps in OOP/First Steps in OOP - Lab">First Steps in OOP</a>     |
 | <a href="1.First Steps in OOP/First Steps in OOP - Exercise">Exercise: First Steps in OOP</a> |
+| ----------------------------- |
+| <a href="2.Classes and Objects">Classes and Objects</a> |
+| ------------------ |
+| <a href="2.Classes and Objects/Classes and Objects - Lab">Classes and Objects</a> |