Merge pull request #21 from qiniu/develop

Release v1.0.2
Merge pull request #22 from qiniu/develop

mac auth
Merge pull request #23 from qiniu/develop

Update README.md
Merge pull request #25 from qiniu/develop

Release v1.0.3
Merge pull request #26 from qiniu/develop

Update CHANGELOG.md
Merge pull request #27 from qiniu/develop

Release v6.0.0
Merge pull request #28 from qiniu/develop

Release v6.0.0 (patch)
DOCS.md