Agreement on Compatibility

(cherry picked from commit 72742fc)

Author: gmilano

README.md

@@ -88,3 +88,7 @@ Once you compiled or packaged everything you needed, you can stop the container
     See the License for the specific language governing permissions and
     limitations under the License.
 
+  ## Agreement on Compatibility from now on
+  
+  Interfaces started to be used in this refactoring process, and GeneXus SA commits evolving some of them maintaining compatibility.
+