Screenshot resizing works in the UI now. Still missing rate limiting.

lib/roles/device/plugins/screenshot.js

@@ -31,7 +31,7 @@ module.exports = syrup.serial()
             )))
           }
           else {
-            resolve(storage.store(res, {
+            resolve(storage.store('image', res, {
               filename: util.format('%s.png', options.serial)
             , contentType: 'image/png'
             , knownLength: +res.headers['content-length']