v0.9.2

This release addressed all the known issue reported from community since first public release.

1. Added a flag -d to mount in background
2. Finish compaction part 2: copy small objects into bigger one.
3. Added pessimistic lock to reduce contention for Redis transaction, to avoid failure under high pressure.
4. Show . and .. when list a directory with -a in Linux.
5. Fixed errno for getxattr on internal files.
6. Fixed local block cache.
7. Support Scaleway and Minio as object store.
8. Support mount using /etc/fstab and auto mount after boot.
9. Added an option --force to overwrite existing format in Redis.
10. log INFO into syslog, also DEBUG in daemon mode.