Implement token refresh mechanism

Change-Id: Id58e14f663ebdd86f3f2206d4bfb9ad5d87a35fa
diff --git a/Changes b/Changes
index 968164a..7d28cfa 100755
--- a/Changes
+++ b/Changes
@@ -9,6 +9,7 @@
           (such as the Piwik plugin).
         - Fix treatment of legacy "collection" parameter.
         - Fix pagination by not repeating page value in URL.
+        - Added auto-refresh of OAuth tokens.
 
         WARNING: This requires relogin for all users!