I've added the function to transition from slide to slide. Add data-transition in the <a> tag

Use the following items to specify how to transition from slide to slide:

```html

<a href="part_one.html" data-transition="fadeIn"></a>
<a href="part_one.html" data-transition="fadeInOut"></a>
<a href="part_one.html" data-transition="fadeOut"></a>
<a href="part_one.html" data-transition="none"></a>
```

* __fadeIn__ - This will fade in the next slide, but the current slide will cut out immediately.
* __fadeInOut__ - Fade out current slide, next slide fades in
* __fadeOut__ - Fade out current slide, next slide comes in immediately
* __none or blank__ - Straight cuts.