/**
 * mkLocalCfg function,
 * makes a local config directory structure and empty config file.
 * in the form "~/.config/nobjs/nobjs_config.json"
 *
 * @param {mkLocalCfgCallback} cb - The callback that handles the response.
 *
 */
function mkLocalCfg(cb) {
    //validate root folder exists, if not make it.
    if (!admin.hasHomeConfigDir()) {
        fs.mkdir(os.homedir() + "/.config", "775", function(err) {
            //stop here if you can't make it.
            if (err) {cb(err); return;}
        });
    }
    fs.mkdir(admin.getConfigLocation(false), "775", function(err) {
        //can't make config folder end it here
        if (err) {cb(err); return;}
        //write config file, return null or err on error
        fs.writeFile(admin.getConfigLocation(true), JSON.stringify({blogs: {}}), function(err) {
            if (err) {cb(err); return;}
            cb(null);
        });
    });
}