use localfilestorage to calc checksums
comment theme checksum while i move that logic into a task
fix fallback (bug 871839)
add 'premium_type' as a settable field on apps.
bump yulelog with new package with new META-INF/ids.json (bug 871311)
add `price` and `payment_account` as settable fields on webapps. (bug 869557) (bug 869559)