Merge branch 'cli_parsing' into 'master'

    po::options_description desc("Allowed options");

    desc.add_options()

            ("help,h", "Help message")

            ("mountdir,m", po::value<string>(), "User Fuse mountdir.")

            ("rootdir,r", po::value<string>(), "ADA-FS data directory")

            ("mountdir,m", po::value<string>()->required(), "User Fuse mountdir.")

            ("rootdir,r", po::value<string>()->required(), "ADA-FS data directory")

            ("hostfile", po::value<string>(), "Path to the hosts_file for all fs participants")

            ("hosts,h", po::value<string>(), "Comma separated list of hosts_ for all fs participants");

    po::variables_map vm;

    po::store(po::parse_command_line(argc, argv, desc), vm);

    try{

        po::notify(vm);

    }catch(po::required_option& e){

        std::cerr << "Error: " << e.what() << "\n";

        return 1;

    }

    if (vm.count("help") || argc < 3) {

    if (vm.count("help")) {

        cout << desc << "\n";

        return 1;

    }