Merge pull request #2 from wangtuanjie/feature/add_batch_unit_test

Feature/add batch unit test
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Merge remote-tracking branch 'qiniu/develop' into develop
Merge remote-tracking branch 'qiniu/develop' into develop
Merge remote-tracking branch 'qiniu/develop' into develop
Merge remote-tracking branch 'qiniu/develop' into develop
Merge remote-tracking branch 'qiniu/develop' into develop
Merge pull request #100 from wangtuanjie/fix/docs

Fix/docs
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