Remove client request requirement from respondWith(). Closes #725.
Remove client request requirement from respondWith(). Closes #725.

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