commit a new branch based on develop branch to test conflict or not
Merge remote branch 'qiniu/develop' into feature/fileop_based_develop_branch
to trigger travis check
refactoring with the given review suggestions
remove old fileop.java
remove unused imports
remove unused variable
fixed up by the review suggestions
fixed 2rd by review suggestions
fixed 3rd by review suggestins
fixed 4th by review suggestions
Merge pull request #24 from wangjinlei/feature/fileop_based_develop_branch

commit a new branch based on develop branch to test conflict or not