docs: added 4.0.1 release notes

docs/release-notes/release-notes-4.0.1.rst

@@ -0,0 +1,17 b''
+|RCE| 4.0.1 |RNS|
+-----------------
+
+Release Date
+^^^^^^^^^^^^
+
+- 2016-05-25
+
+Fixes
+^^^^^
+
+- fixed default session to be file based instead of memory which causes
+  problems in multi-worker setup
+- ui: fixing forks table #3959
+- ui: fixed gravatars misalignment issues
+- logging: fixed excesive formatting on auth logging
+- pull requests: better ref selection  when opening PRs from changelog

docs/release-notes/release-notes.rst

@@ -6,6 +6,7 b' Release Notes'
 |RCE| 4.x Versions
 ------------------
 
+   release-notes-4.0.1.rst
    release-notes-4.0.0.rst
 
 |RCE| 3.x Versions