code: function () {
          var prefix = 'INFO';
          this.output(prefix, prefix.green, Array.prototype.slice.call(arguments));
      }
docs: @name info
  @memberof logger
  @method
  @param {Arguments} messages Variable argument message
  @example
  logger.info('hoge', 'foo', 'bar', 10);
  
  > hoge foo bar 10