Merge remote branch 'cloudant:fix-return-value'

This closes #13

Signed-off-by: ILYA Khlopotov <iilyak@ca.ibm.com>
diff --git a/src/config_notifier.erl b/src/config_notifier.erl
index 52fc4c0..6add8d6 100644
--- a/src/config_notifier.erl
+++ b/src/config_notifier.erl
@@ -45,7 +45,8 @@
     {ok, {Subscriber, Subscription}}.
 
 handle_event({config_change, _, _, _, _} = Event, {Subscriber, Subscription}) ->
-    maybe_notify(Event, Subscriber, Subscription).
+    maybe_notify(Event, Subscriber, Subscription),
+    {ok, {Subscriber, Subscription}}.
 
 handle_call(_Request, St) ->
     {ok, ignored, St}.