old_contents: module.exports = function logFactory() {
    var winston = require('winston');
    winston.cli();
    winston.level = 'info';
    return winston;
  };
new_contents: /**
   * @dgService log
   * @kind object
   * @description
   * A service for logging what the dgeni is up to
   */
  module.exports = function logFactory() {
    var winston = require('winston');
    winston.cli();
    winston.level = 'info';
    return winston;
  };
subject: add documentation to log service