title: How can I poll FTP location to trigger the changes in it?
body: <p>I am trying to poll the ftp location.
  I'm using Jenkins for continuous integration of the projects.So, it would be helpful if anyone can suggest me with a plugin in Jenkins or any other method to watch over the changes in FTP location. 
  I need to monitor the changes in FTP location and as the changes are found I have to build another job.</p>