module to monitor file and directory changes

 File::Monitor provides a simple interface for monitoring one or more files or
 directories and reporting any changes that are made to them.
 .
 It can:
   * Monitor existing files for changes to any of the attributes returned
     by the stat function
   * Monitor files that don't yet exist and notify you if they are created
   * Notify when a monitored file is deleted
   * Notify when files are added or removed from a directory