output user-frendly 'No config settings found' if this is the case

lib/cli/commands/config.js

@@ -35,7 +35,10 @@ exports.init = function (cli) {
           log.info('Displaying config settings');
 
           var cfg = account.readConfig();
-
+          if (!log.format().json && Object.keys(cfg).length === 0) {
+            log.info('No config settings found');
+            return;
+          }
           log.table(cfg, function (row, name) {
             row.cell('Setting', name);
             row.cell('Value', cfg[name]);