message: synced node detection with library
diff: * DESC: Common test/demo slides for all library features
  * DEPS: Loaded by `pptxgenjs-demo.js` and `nodejs-demo.js`
  * VER.: 2.5.0
  -* BLD.: 20181103
  +* BLD.: 20181125
  */
  // Detect Node.js (NODEJS is ultimately used to determine how to save: either `fs` or web-based, so using fs-detection is perfect)
  var NODEJS = false;
  {
  // NOTE: `NODEJS` determines which network library to use, so using fs-detection is apropos.
  - if ( typeof module !== 'undefined' && module.exports && typeof require === 'function' ) {
  + if ( typeof module !== 'undefined' && module.exports && typeof require === 'function' && typeof window === 'undefined' ) {
  try {
  require.resolve('fs');
  NODEJS = true;
  