Update README.md

Author: benkeen

README.md

@@ -1,4 +1,12 @@
-module_extended_client_fields
-=============================
+## Extended Client Fields module
 
 The Extended Client Fields module.
+
+### Documentation
+
+[https://docs.formtools.org/modules/extended_client_fields/](https://docs.formtools.org/modules/extended_client_fields/)
+
+### Form Tools Extensions
+
+For further information about Form Tools modules, check out:
+[https://modules.formtools.org](https://modules.formtools.org)