add Changelog

Author: baszoetekouw

Changelog.md

@@ -0,0 +1,20 @@
+# Release notes
+
+Starting from version 5.0.0, we note changes and new features per release in this file.
+
+## 5.1.0
+
+- Bugfixes for the instituion aggregator:
+  - Allow mapping of `urn:mace:dir:attribute-def:uid` attribute in institution aggregator (#140)
+  - Gracefully handle the case that no InstitutionEndpoint is configured for an SP
+- Make backend-connections less persistent; lifetime of a connection is now max 60s (#141)
+- Change the paths for the info and health endpoints to support removal of the (url-rewriting) client
+  Specifically, `/aa/api/internal/health` has been renamed to `/internal/health`,
+  and `/aa/api/internal/info` has been renamed to `/internal/info`
+  TODO: check
+- Fix dockerfile in order for the aa-server component to expose port 8080 (was previously handled by aa-client)
+- Maintenance:
+  - Update Readme to remove references to aa-gui
+  - Add Changelog
+  - Add editorconfig
+  - Remove obsolete Travis config