coping with my settings being synced

resubmission to base off my fork instead of uploading a patch. thanks bas for letting me use your knot. wait. "use knot...." drool...... stores your settings in a draft with the same gzip encoding as cope. slightly different manifest since i couldn't figure out what all of the keys were. opt in by default. effectively, when enabled, settings are synced per-account instead of per-device.