function showShowdownOptions () {
  'use strict';
  var showdownOptions = showdown.getDefaultOptions(false);
  console.log('\nshowdown makehtml config options:');
  // show showdown options
  for (var sopt in showdownOptions) {
    if (showdownOptions.hasOwnProperty(sopt)) {
      console.log('  ' + sopt + ':', '[default=' + showdownOptions[sopt].defaultValue + ']',showdownOptions[sopt].describe);
    }
  }
  console.log('\n\nExample: showdown makehtml -c openLinksInNewWindow ghMentions ghMentionsLink="https://google.com"');
}
Helper function to show Showdown Options