Move URLs to be strings in the explainer. Refs #154
Move URLs to be strings in the explainer. Refs #154

martinthomson/ServiceWorker,martinthomson/ServiceWorker,martinthomson/ServiceWorker,mkruisselbrink/ServiceWorker,slightlyoff/ServiceWorker,chadoliver/ServiceWorker,justinleoye/ServiceWorker,karolklp/ServiceWorker,chadoliver/ServiceWorker,zuzusik/ServiceWorker,mkruisselbrink/ServiceWorker,karolklp/ServiceWorker,zuzusik/ServiceWorker,zuzusik/ServiceWorker,justinleoye/ServiceWorker,slightlyoff/ServiceWorker,justinleoye/ServiceWorker,chadoliver/ServiceWorker,karolklp/ServiceWorker