1.change to use chokidar for watch files; 2.Complete add files and rm files handle; 3.Fix bug : Crash when DB is empty
1.change to use chokidar for watch files; 2.Complete add files and rm files handle; 3.Fix bug : Crash when DB is empty
Revert "1.change to use chokidar for watch files; 2.Complete add files and rm files handle; 3.Fix bug : Crash when DB is empty"

This reverts commit a065f9ecbdd25ae80d928beade3f4adae9fbd5bf.
Change to use chokidar for watch files
Merge branch 'Data' of ssh://github.com/IbpTeam/demo-rio into data#40_wangfeng
1.change to use chokidar for watch files; 2.Complete add files and rm files handle; 3.Fix bug : Crash when DB is empty
Merge branch 'data#40_wangfeng' of github.com:v11985/demo-rio into data#40_wangfeng
Merge pull request #101 from v11985/data#40_wangfeng

Data#40 wangfeng->yuanzhe