Feature Request: A way to tell when Simperium is done downloading data from the web on sign in.

[lukegeiger]

@jleandroperez As it sits right now, when a user logs back into my application, they probably will see no information because it is being downloaded from Simperium. It would be nice if I could have the ability to just show a loading indicator and wait on login before they were allowed to use the app.

[jleandroperez]

@lukegeiger since Simperium actually works as a stream of changes going both ways, having an event to indicate "download ready" would probably never be 100% accurate (since we cannot know when "it's ready").

However, one possibility would be to hook up to the bucketDidFinishIndexing: delegate method, which is expected to get called as soon as the index process is complete. That is: after the framework logged in, retrieved the remote index, and downloaded the entities, at that precise point.

[jleandroperez]

Closing in favor of Issue #442