fix up some cache references

Author: xssfox

js/app.js

@@ -1030,6 +1030,12 @@ function check_version(){
         .then(function(response){ return response.json()})
         .then(function(response){
             if (response['version'] != document.body.dataset.version) {
+                
+                caches.keys().then(function(names) { // wipe cache for fresh reload
+                    for (let name of names)
+                        caches.delete(name);
+                });
+
                 window.clearInterval(update_check)
                 reload_timer = window.setTimeout(update_site, response['refresh']*1000)
                 reload_end_time = new Date().getTime() +response['refresh']*1000

service-worker.template.js

@@ -41,11 +41,12 @@ self.addEventListener('install', function(event) {
                     '/img/markers/shadow.png',
                     '/img/markers/balloon-pop.png',
                     '/img/hab-spinner.gif',
-                    '/img/sondehub_logo.png',
+                    '/img/sondehub_au.png',
                     '/favicon.ico',
                     '/font/HabitatFont.woff',
                     '/font/Roboto-regular.woff',
-                    '/index.html'
+                    '/index.html',
+                    '/'
                 ]
             );
         })