Fix persistent headers/footers

Also removed an unnecessary console.log.

Change-Id: I8700f62e7558e77922f95319bb1c7c5f7e76c0b8
diff --git a/sw.js b/sw.js
index 8008101..51e7c08 100644
--- a/sw.js
+++ b/sw.js
@@ -1,4 +1,4 @@
-var CACHE_NAME = 'all-v1.1.7';
+var CACHE_NAME = 'all-v1.1.8';
 var urlsToCache = [
   '/',
   '/css/styles.css',