Update release notes

Author: Jérémie Bertrand

ReleaseNotes.md

@@ -1,3 +1,13 @@
+# 0.6.0 (2017-01-29)
+
+ - [#317](https://github.com/Code52/pretzel/pull/317) - Support for :slug in permalinks contributed by Thomas Freudenberg ([thoemmi](https://github.com/thoemmi)) +Enhancement
+ - Fix rss/atom feeds and add site settings in config +Fix
+ - Add more info on "Error converting markdown" +Enhancement
+ - Cleaning of Tracing/Logger - Logger is now deprecated +Breaking-change
+
+Commits: 8ffc7d6444...35f9a0491d
+
+
 # 0.5.0 (2016-10-29)
 
  - [#314](https://github.com/Code52/pretzel/pull/314) - Fix the files are rendered too much time contributed by Jérémie Bertrand ([laedit](https://github.com/laedit))