basic implementation of having reveal.js slides working

There is still a lot of work needed to be done here, but the basics
are laid out.

src/qml/presenter/MainWindow.qml

@@ -192,7 +192,7 @@ Controls.Page {
         slideHelper.chngSlide(item, index, SlideObject);
         /* SlideMod.activate(index); */
         presentation.textIndex = 0;
-        console.log("Slide changed to: " + index);
+        console.log("Slide changed to: ", item.imageBackground);
         activeServiceItem = ServiceItemModel.getItem(currentServiceItem).name;
     }