README: todo re: quota, timeout, etc. errors as IndexedDB objects rather than WebSQL ones
README: todo re: quota, timeout, etc. errors as IndexedDB objects rather than WebSQL ones

pixel9/IndexedDBShim,pixel9/IndexedDBShim,kir/IndexedDBShim,pixel9/IndexedDBShim,kir/IndexedDBShim,kir/IndexedDBShim