changes to sftp utility to allow calculating md5 sum, as well as to be able to use ssh key for authorization

reworked reporting for both daqs and uploads; improved ftp utility efficiency; simplified file processing

reworked reporting for both daqs and uploads; improved ftp utility efficiency; simplified file processing

found bug with empty destination directory;prevent checking for upload if plugin does not need to process files

added replacement of storage directory with data directory for the purpose of comparing original and storage file directory