changes to sftp utility to allow calculating md5 sum, as well as to be able to use ssh key for authorization
introduce timer for directory processing; fix for updating file permissions when directory processing is used
added stop-upload command; removed un-needed file stats; improved daq/upload reporting; cleaned up un-needed keys from catalog plugin
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
modifications to eliminate processing of hidden files and of unchanged files that were processed already; checksum is now done by default
