SFTP/FTP loader that looks for new files

usage:
For FTP session:
python load_sftp.py --host=<host> --user=<user> --password=<password> --remote_dir=<remote dir>  --local_dir=out --history_file=custom_history --debug=DEBUG

For SFTP session:
python load_sftp.py --host=<host> --user=<user> --password=<password> --remote_dir=<remote dir>  --local_dir=out --history_file=custom_history --debug=DEBUG --protocol=scp

For SFTP session publickey authorization:
python load_sftp.py --host=<host> --user=<user> --password=<password> --remote_dir=<remote dir>  --local_dir=out --history_file=custom_history --debug=DEBUG --protocol=scp --pkey


lib should contain paramiko lib

pkeys - could contain keys and known_hosts file otherwise client will use ~/.ssh directory