Discrobble: Vinyl Scrobbler

A bug fix / performance release. Pull-to-refresh is way more reliable (and helpful) now. • The "Syncing…" message no longer gets stuck. Every refresh now ends with a result: up to date, what was added or removed, or what went wrong. • If Discogs is rate-limiting you, the app says so and waits, then gives up after a few tries instead of trying forever. • Syncing uses half as many Discogs requests, so you're far less likely to hit the rate limit in the first place. • Only one sync runs at a time. Refresh from Settings, the weekly check, and pull-to-refresh now take turns instead of tripping over each other. • If your Discogs collection is private, pull-to-refresh tells you how to fix it instead of failing quietly.