message: Add support for font family css when export HTML table to slide.
diff: @@ -5505,6 +5505,11 @@ var PptxGenJS = function(){
  color: rgbToHex( Number(arrRGB1[0]), Number(arrRGB1[1]), Number(arrRGB1[2]) ),
  fill: rgbToHex( Number(arrRGB2[0]), Number(arrRGB2[1]), Number(arrRGB2[2]) )
  };
  + var fontFamily = jQuery(cell).css('font-family').replace(/["]/gi,'').split(", ")[0];
  + if (fontFamily !== "" && fontFamily !== "inherit" && fontFamily !== "initial") {
  + objOpts.fontFace = fontFamily;
  + }
  +
  if ( ['left','center','right','start','end'].indexOf(jQuery(cell).css('text-align')) > -1 ) objOpts.align = jQuery(cell).css('text-align').replace('start','left').replace('end','right');
  if ( ['top','middle','bottom'].indexOf(jQuery(cell).css('vertical-align')) > -1 ) objOpts.valign = jQuery(cell).css('vertical-align');
  