'WordCamps not yet synced' messaging is confusing

[roundhill]

When you first launch the app, you see a message: WordCamps not yet synced. Maybe something like 'Loading WordCamps' or just 'Loading...'?

[maxme]

We should have different messages on that empty view:

• WordCamps not yet synced (perhaps better worded) - it actually means Network connection needed to fetch WordCamp list - users will see that message only if they can't fetch the list on first start.
• Loading... when the network call is running.
• Network error if the call fails.