Fixed
- Compaction: Use separate compactors for L0, L1 (#1466)
- Rework Block and Index cache (#1473)
- Add IsClosed method (#1478)
- Cleanup: Avoid truncating in vlog.Open on error (#1465)
- Cleanup: Do not close cache before compactions (#1464)
New APIs
- Badger.DB
- Badger.Option