Added Release Notes for 4.1.5

Author: Boy Baukema

docs/release_notes/v4.1.5.md

@@ -0,0 +1,7 @@
+# SURFnet SURFconext EngineBlock v4.1.5 Release Notes #
+
+Bugfix release for 'Transparent' (WAYFless) requests.
+
+* [issues/58](https://github.com/OpenConext/OpenConext-engineblock/issues/58): SP using transparent endpoint should get engine as issuer
+* [issues/57](https://github.com/OpenConext/OpenConext-engineblock/issues/57): In debug email, NameID shows as Array
+* [issues/54](https://github.com/OpenConext/OpenConext-engineblock/issues/54): profile needs htmlentities escaping bug