Fix default embedding for Piwik

Change-Id: I0899c266c596584742c586a3153c71b248e948fc
diff --git a/kalamar.conf b/kalamar.conf
index e6d8e05..e6531fc 100644
--- a/kalamar.conf
+++ b/kalamar.conf
@@ -52,7 +52,7 @@
 
   # See Mojolicious::Plugin::Piwik
   Piwik => {
-    embed => 'false'
+    embed => 0
   },
 
   # See Mojolicious::Plugin::CHI