Start entry for 3.1.8

Changelog

@@ -8,6 +8,13 @@ This document contains change notes for bugfix releases in the 3.1.x series
 (Cipater), please see :ref:`whatsnew-3.1` for an overview of what's
 new in Celery 3.1.
 
+.. _version-3.1.8:
+
+3.1.8
+=====
+:release-date: 2014-01-17 XX:XX X.X UTC
+:release-by: Ask Solem
+
 .. _version-3.1.7:
 
 3.1.7