Modify version (#870)

(#null)

Fix bfs_client return value (#775)

(#754)

Fix a Spelling error SDk to SDK (#737)

(#580)

Add file lock doc (#657)

(#622）Add file lock design doc

fix gcc error when using fuse (#633)

Merge pull request #553 from yvxiang/show_tag

Show chunkserver tag is SysStat #551

Merge pull request #534 from baidu/master

Merge master

Merge pull request #515 from yvxiang/write

Hold lock in Block::Write

Merge pull request #511 from yvxiang/seek

Support seek write file

Merge pull request #490 from yvxiang/lock

Add lock