clean gulp build and crunched gfx

src/service-worker.js

@@ -11,7 +11,7 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-const CACHE_VERSION = 7;
+const CACHE_VERSION = 8;
 const dataCacheName = 'jubileeData-v1';
 const cacheName = 'jubilee-final-1';
 const filesToCache = [