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Merge pull request #2 from icattlecoder/feature/fop

Feature/fop
Merge remote-tracking branch 'qiniu/develop' into develop
Merge remote-tracking branch 'qiniu/develop' into develop
fix tags
Merge pull request #44 from longshanksmo/fix/tags

Fix/tags
Merge pull request #45 from qiniu/develop

fix lost tag in put & add some sample to image process