message: images and media work in IE11 now; minor fixes
diff: * DESC: Common test/demo slides for all library features
  * DEPS: Loaded by `pptxgenjs-demo.js` and `nodejs-demo.js`
  * VER.: 2.2.0-beta
  -* BLD.: 20180423
  +* BLD.: 20180424
  */
  // Detect Node.js
  @@ -183,7 +183,7 @@ function genSlides_Table(pptx) {
  slide.addTable( [ [{ text:'Table Examples 1', options:gOptsTextL },gOptsTextR] ], gOptsTabOpts );
  // DEMO: align/valign -------------------------------------------------------------------------
  - var objOpts1 = { x:0.5, y:0.7, fontSize:18, fontFace:'Arial', color:'0088CC' };
  + var objOpts1 = { x:0.5, y:0.7, w:4, fontSize:18, fontFace:'Arial', color:'0088CC' };
  slide.addText('Cell Text Alignment:', objOpts1);
  var arrTabRows = [
  @@ -209,7 +209,7 @@ function genSlides_Table(pptx) {
  // Pass default cell style as tabOpts, then just style/override individual cells as needed
  // DEMO: cell styles --------------------------------------------------------------------------
  - var objOpts2 = { x:6.0, y:0.7, fontSize:18, fontFace:'Arial', color:'0088CC' };
  + var objOpts2 = { x:6.0, y:0.7, w:4, fontSize:18, fontFace:'Arial', color:'0088CC' };
  slide.addText('Cell Styles:', objOpts2);
  var arrTabRows = [
  @@ -2329,7 +2329,7 @@ function genSlides_Text(pptx) {
  { text:' // Super'},
  { text:'Superscript', options:{ superscript:true } }
  ],
  - { x:10, y:6.3 }
  + { x:10, y:6.3, w:3.3 }
  );
  // TEST: using {option}: Add text box with multiline options:
  