Revert "Add raw blob size to blob index (#334)" (#335)

Add raw blob size to blob index (#334)

Update compatibility part of README (#333)

Fix close hang (#331)

Upgrade RocksDB (#319)

Propagate for_compaction from compaction filter (#325)

Conditionally compile compression test (#316)

Add block size for blob file (#323)

Use kDontChargeCacheMetadata for blob file cache (#318)

Check blob cache before getting blob file reader (#312)

Make discardable ratio and compression type online configurable (#310)

Avoid extra mutex for getting blob file reader (#311)

Refine blob cache related code (#309)

Make min-blob-size online configurable (#306)

Fix truncated file name in log (#304)