add FileSyncClientService class
add FileSyncClientService in the main function
Merge branch 'master' of https://github.com/haijunq/dblike
Merge branch 'master' of https://github.com/haijunq/dblike
modify FileSyncClientService class
Merge branch 'master' of https://github.com/haijunq/dblike
modify FileSyncServerService class