Issue with initial load from iCloud

[aedificator-nl]

On an initial install of an app with Zephyr the iCloud data is not immediately available. Once it is available is should be synced with the current UserDefaults. This does not happen on an initial load however, as keysDidChangeOnCloud will return early if localStoredDate is nil (which it is as this is the initial load of the application).

The issue seems to be in keysDidChangeOnCloud:452, have made a PR: #47.

[ArtSabintsev]

Let's discuss this in your open PR.

Thank you!