diff --git a/inst/reveal.js-4.6.1/demo.html b/inst/reveal.js-4.6.1/demo.html
new file mode 100644
index 0000000..5a8ba36
--- /dev/null
+++ b/inst/reveal.js-4.6.1/demo.html
@@ -0,0 +1,481 @@
+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js – The HTML Presentation Framework</title>
+
+		<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
+		<meta name="author" content="Hakim El Hattab">
+
+		<meta name="apple-mobile-web-app-capable" content="yes">
+		<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
+
+		<meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+		<link rel="stylesheet" href="dist/reset.css">
+		<link rel="stylesheet" href="dist/reveal.css">
+		<link rel="stylesheet" href="dist/theme/black.css" id="theme">
+
+		<!-- Theme used for syntax highlighting of code -->
+		<link rel="stylesheet" href="plugin/highlight/monokai.css">
+	</head>
+
+	<body>
+
+		<div class="reveal">
+
+			<!-- Any section element inside of this container is displayed as a slide -->
+			<div class="slides">
+				<section>
+					<a href="https://revealjs.com">
+						<img src="https://static.slid.es/reveal/logo-v1/reveal-white-text.svg" alt="reveal.js logo" style="height: 180px; margin: 0 auto 4rem auto; background: transparent;" class="demo-logo">
+					</a>
+					<h3>The HTML Presentation Framework</h3>
+					<p>
+						<small>Created by <a href="http://hakim.se">Hakim El Hattab</a> and <a href="https://github.com/hakimel/reveal.js/graphs/contributors">contributors</a></small>
+					</p>
+				</section>
+
+				<section>
+					<h2>Hello There</h2>
+					<p>
+						reveal.js enables you to create beautiful interactive slide decks using HTML. This presentation will show you examples of what it can do.
+					</p>
+				</section>
+
+				<!-- Example of nested vertical slides -->
+				<section>
+					<section>
+						<h2>Vertical Slides</h2>
+						<p>Slides can be nested inside of each other.</p>
+						<p>Use the <em>Space</em> key to navigate through all slides.</p>
+						<br>
+						<a href="#/2/1" class="navigate-down">
+							<img class="r-frame" style="background: rgba(255,255,255,0.1);" width="178" height="238" data-src="https://static.slid.es/reveal/arrow.png" alt="Down arrow">
+						</a>
+					</section>
+					<section>
+						<h2>Basement Level 1</h2>
+						<p>Nested slides are useful for adding additional detail underneath a high level horizontal slide.</p>
+					</section>
+					<section>
+						<h2>Basement Level 2</h2>
+						<p>That's it, time to go back up.</p>
+						<br>
+						<a href="#/2">
+							<img class="r-frame" style="background: rgba(255,255,255,0.1); transform: rotate(180deg);" width="178" height="238" data-src="https://static.slid.es/reveal/arrow.png" alt="Up arrow">
+						</a>
+					</section>
+				</section>
+
+				<section>
+					<h2>Slides</h2>
+					<p>
+						Not a coder? Not a problem. There's a fully-featured visual editor for authoring these, try it out at <a href="https://slides.com" target="_blank">https://slides.com</a>.
+					</p>
+				</section>
+
+				<section data-visibility="hidden">
+					<h2>Hidden Slides</h2>
+					<p>
+						This slide is visible in the source, but hidden when the presentation is viewed. You can show all hidden slides by setting the `showHiddenSlides` config option to `true`.
+					</p>
+				</section>
+
+				<section data-auto-animate>
+					<h2 data-id="code-title">Pretty Code</h2>
+					<pre data-id="code-animation"><code class="hljs javascript" data-trim data-line-numbers>
+						import React, { useState } from 'react';
+
+						function Example() {
+						  const [count, setCount] = useState(0);
+
+						  return (
+						    ...
+						  );
+						}
+					</code></pre>
+					<p>Code syntax highlighting courtesy of <a href="https://highlightjs.org/usage/">highlight.js</a>.</p>
+				</section>
+
+				<section data-auto-animate>
+					<h2 data-id="code-title">With Animations</h2>
+					<pre data-id="code-animation"><code class="hljs javascript" data-trim data-line-numbers="|4,8-11|17|22-24"><script type="text/template">
+						import React, { useState } from 'react';
+
+						function Example() {
+						  const [count, setCount] = useState(0);
+
+						  return (
+						    <div>
+						      <p>You clicked {count} times</p>
+						      <button onClick={() => setCount(count + 1)}>
+						        Click me
+						      </button>
+						    </div>
+						  );
+						}
+
+						function SecondExample() {
+						  const [count, setCount] = useState(0);
+
+						  return (
+						    <div>
+						      <p>You clicked {count} times</p>
+						      <button onClick={() => setCount(count + 1)}>
+						        Click me
+						      </button>
+						    </div>
+						  );
+						}
+					</script></code></pre>
+				</section>
+
+				<section>
+					<h2>Point of View</h2>
+					<p>
+						Press <strong>ESC</strong> to enter the slide overview.
+					</p>
+					<p>
+						Hold down the <strong>alt</strong> key (<strong>ctrl</strong> in Linux) and click on any element to zoom towards it using <a href="http://lab.hakim.se/zoom-js">zoom.js</a>. Click again to zoom back out.
+					</p>
+					<p>
+						(NOTE: Use ctrl + click in Linux.)
+					</p>
+				</section>
+
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<h2>Auto-Animate</h2>
+					<p>Automatically animate matching elements across slides with <a href="https://revealjs.com/auto-animate/">Auto-Animate</a>.</p>
+					<div class="r-hstack justify-center">
+						<div data-id="box1" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+						<div data-id="box2" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+						<div data-id="box3" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+					</div>
+				</section>
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<div class="r-hstack justify-center">
+						<div data-id="box1" data-auto-animate-delay="0" style="background: cyan; width: 150px; height: 100px; margin: 10px;"></div>
+						<div data-id="box2" data-auto-animate-delay="0.1" style="background: magenta; width: 150px; height: 100px; margin: 10px;"></div>
+						<div data-id="box3" data-auto-animate-delay="0.2" style="background: yellow; width: 150px; height: 100px; margin: 10px;"></div>
+					</div>
+					<h2 style="margin-top: 20px;">Auto-Animate</h2>
+				</section>
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<div class="r-stack">
+						<div data-id="box1" style="background: cyan; width: 300px; height: 300px; border-radius: 200px;"></div>
+						<div data-id="box2" style="background: magenta; width: 200px; height: 200px; border-radius: 200px;"></div>
+						<div data-id="box3" style="background: yellow; width: 100px; height: 100px; border-radius: 200px;"></div>
+					</div>
+					<h2 style="margin-top: 20px;">Auto-Animate</h2>
+				</section>
+
+				<section>
+					<h2>Touch Optimized</h2>
+					<p>
+						Presentations look great on touch devices, like mobile phones and tablets. Simply swipe through your slides.
+					</p>
+				</section>
+
+				<section data-markdown>
+					<script type="text/template">
+						## Markdown Support
+
+						Write content using inline or external Markdown.
+						Instructions and more info available in the [docs](https://revealjs.com/markdown/).
+
+						```html []
+						<section data-markdown>
+						  ## Markdown Support
+
+						  Write content using inline or external Markdown.
+						  Instructions and more info available in the [docs](https://revealjs.com/markdown/).
+						</section>
+						```
+					</script>
+				</section>
+
+				<section>
+					<p>Add the <code>r-fit-text</code> class to auto-size text</p>
+					<h2 class="r-fit-text">FIT TEXT</h2>
+				</section>
+
+				<section>
+					<section id="fragments">
+						<h2>Fragments</h2>
+						<p>Hit the next arrow...</p>
+						<p class="fragment">... to step through ...</p>
+						<p><span class="fragment">... a</span> <span class="fragment">fragmented</span> <span class="fragment">slide.</span></p>
+
+						<aside class="notes">
+							This slide has fragments which are also stepped through in the notes window.
+						</aside>
+					</section>
+					<section>
+						<h2>Fragment Styles</h2>
+						<p>There's different types of fragments, like:</p>
+						<p class="fragment grow">grow</p>
+						<p class="fragment shrink">shrink</p>
+						<p class="fragment fade-out">fade-out</p>
+						<p>
+							<span style="display: inline-block;" class="fragment fade-right">fade-right, </span>
+							<span style="display: inline-block;" class="fragment fade-up">up, </span>
+							<span style="display: inline-block;" class="fragment fade-down">down, </span>
+							<span style="display: inline-block;" class="fragment fade-left">left</span>
+						</p>
+						<p class="fragment fade-in-then-out">fade-in-then-out</p>
+						<p class="fragment fade-in-then-semi-out">fade-in-then-semi-out</p>
+						<p>Highlight <span class="fragment highlight-red">red</span> <span class="fragment highlight-blue">blue</span> <span class="fragment highlight-green">green</span></p>
+					</section>
+				</section>
+
+				<section id="transitions">
+					<h2>Transition Styles</h2>
+					<p>
+						You can select from different transitions, like: <br>
+						<a href="?transition=none#/transitions">None</a> -
+						<a href="?transition=fade#/transitions">Fade</a> -
+						<a href="?transition=slide#/transitions">Slide</a> -
+						<a href="?transition=convex#/transitions">Convex</a> -
+						<a href="?transition=concave#/transitions">Concave</a> -
+						<a href="?transition=zoom#/transitions">Zoom</a>
+					</p>
+				</section>
+
+				<section id="themes">
+					<h2>Themes</h2>
+					<p>
+						reveal.js comes with a few themes built in: <br>
+						<!-- Hacks to swap themes after the page has loaded. Not flexible and only intended for the reveal.js demo deck. -->
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/black.css'); return false;">Black (default)</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/white.css'); return false;">White</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/league.css'); return false;">League</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/sky.css'); return false;">Sky</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/beige.css'); return false;">Beige</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/simple.css'); return false;">Simple</a> <br>
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/serif.css'); return false;">Serif</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/blood.css'); return false;">Blood</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/night.css'); return false;">Night</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/moon.css'); return false;">Moon</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/solarized.css'); return false;">Solarized</a>
+					</p>
+				</section>
+
+				<section>
+					<section data-background="#dddddd">
+						<h2>Slide Backgrounds</h2>
+						<p>
+							Set <code>data-background="#dddddd"</code> on a slide to change the background color. All CSS color formats are supported.
+						</p>
+						<a href="#" class="navigate-down">
+							<img class="r-frame" style="background: rgba(255,255,255,0.1);" width="178" height="238" data-src="https://static.slid.es/reveal/arrow.png" alt="Down arrow">
+						</a>
+					</section>
+					<section data-background-gradient="linear-gradient(to bottom, #283b95, #17b2c3)">
+						<h2>Gradient Backgrounds</h2>
+						<pre><code class="hljs html wrap">&lt;section data-background-gradient=
+							"linear-gradient(to bottom, #ddd, #191919)"&gt;</code></pre>
+					</section>
+					<section data-background="https://static.slid.es/reveal/image-placeholder.png">
+						<h2>Image Backgrounds</h2>
+						<pre><code class="hljs html">&lt;section data-background="image.png"&gt;</code></pre>
+					</section>
+					<section data-background="https://static.slid.es/reveal/image-placeholder.png" data-background-repeat="repeat" data-background-size="100px">
+						<h2>Tiled Backgrounds</h2>
+						<pre><code class="hljs html" style="word-wrap: break-word;">&lt;section data-background="image.png" data-background-repeat="repeat" data-background-size="100px"&gt;</code></pre>
+					</section>
+					<section data-background-video="https://static.slid.es/site/homepage/v1/homepage-video-editor.mp4" data-background-color="#000000">
+						<div style="background-color: rgba(0, 0, 0, 0.9); color: #fff; padding: 20px;">
+							<h2>Video Backgrounds</h2>
+							<pre><code class="hljs html" style="word-wrap: break-word;">&lt;section data-background-video="video.mp4,video.webm"&gt;</code></pre>
+						</div>
+					</section>
+					<section data-background="http://i.giphy.com/90F8aUepslB84.gif">
+						<h2>... and GIFs!</h2>
+					</section>
+				</section>
+
+				<section data-transition="slide" data-background="#4d7e65" data-background-transition="zoom">
+					<h2>Background Transitions</h2>
+					<p>
+						Different background transitions are available via the backgroundTransition option. This one's called "zoom".
+					</p>
+					<pre><code class="hljs javascript">Reveal.configure({ backgroundTransition: 'zoom' })</code></pre>
+				</section>
+
+				<section data-transition="slide" data-background="#b5533c" data-background-transition="zoom">
+					<h2>Background Transitions</h2>
+					<p>
+						You can override background transitions per-slide.
+					</p>
+					<pre><code class="hljs html" style="word-wrap: break-word;">&lt;section data-background-transition="zoom"&gt;</code></pre>
+				</section>
+
+				<section data-background-iframe="https://hakim.se" data-background-interactive>
+					<div style="position: absolute; width: 40%; right: 0; box-shadow: 0 1px 4px rgba(0,0,0,0.5), 0 5px 25px rgba(0,0,0,0.2); background-color: rgba(0, 0, 0, 0.9); color: #fff; padding: 20px; font-size: 20px; text-align: left;">
+						<h2>Iframe Backgrounds</h2>
+						<p>Since reveal.js runs on the web, you can easily embed other web content. Try interacting with the page in the background.</p>
+					</div>
+				</section>
+
+				<section>
+					<h2>Marvelous List</h2>
+					<ul>
+						<li>No order here</li>
+						<li>Or here</li>
+						<li>Or here</li>
+						<li>Or here</li>
+					</ul>
+				</section>
+
+				<section>
+					<h2>Fantastic Ordered List</h2>
+					<ol>
+						<li>One is smaller than...</li>
+						<li>Two is smaller than...</li>
+						<li>Three!</li>
+					</ol>
+				</section>
+
+				<section>
+					<h2>Tabular Tables</h2>
+					<table>
+						<thead>
+							<tr>
+								<th>Item</th>
+								<th>Value</th>
+								<th>Quantity</th>
+							</tr>
+						</thead>
+						<tbody>
+							<tr>
+								<td>Apples</td>
+								<td>$1</td>
+								<td>7</td>
+							</tr>
+							<tr>
+								<td>Lemonade</td>
+								<td>$2</td>
+								<td>18</td>
+							</tr>
+							<tr>
+								<td>Bread</td>
+								<td>$3</td>
+								<td>2</td>
+							</tr>
+						</tbody>
+					</table>
+				</section>
+
+				<section>
+					<h2>Clever Quotes</h2>
+					<p>
+						These guys come in two forms, inline: <q cite="http://searchservervirtualization.techtarget.com/definition/Our-Favorite-Technology-Quotations">The nice thing about standards is that there are so many to choose from</q> and block:
+					</p>
+					<blockquote cite="http://searchservervirtualization.techtarget.com/definition/Our-Favorite-Technology-Quotations">
+						&ldquo;For years there has been a theory that millions of monkeys typing at random on millions of typewriters would
+						reproduce the entire works of Shakespeare. The Internet has proven this theory to be untrue.&rdquo;
+					</blockquote>
+				</section>
+
+				<section>
+					<h2>Intergalactic Interconnections</h2>
+					<p>
+						You can link between slides internally,
+						<a href="#/2/3">like this</a>.
+					</p>
+				</section>
+
+				<section>
+					<h2>Speaker View</h2>
+					<p>There's a <a href="https://revealjs.com/speaker-view/">speaker view</a>. It includes a timer, preview of the upcoming slide as well as your speaker notes.</p>
+					<p>Press the <em>S</em> key to try it out.</p>
+
+					<aside class="notes">
+						Oh hey, these are some notes. They'll be hidden in your presentation, but you can see them if you open the speaker notes window (hit 's' on your keyboard).
+					</aside>
+				</section>
+
+				<section>
+					<h2>Export to PDF</h2>
+					<p>Presentations can be <a href="https://revealjs.com/pdf-export/">exported to PDF</a>, here's an example:</p>
+					<iframe data-src="https://www.slideshare.net/slideshow/embed_code/42840540" width="445" height="355" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" style="border:3px solid #666; margin-bottom:5px; max-width: 100%;" allowfullscreen> </iframe>
+				</section>
+
+				<section>
+					<h2>Global State</h2>
+					<p>
+						Set <code>data-state="something"</code> on a slide and <code>"something"</code>
+						will be added as a class to the document element when the slide is open. This lets you
+						apply broader style changes, like switching the page background.
+					</p>
+				</section>
+
+				<section data-state="customevent">
+					<h2>State Events</h2>
+					<p>
+						Additionally custom events can be triggered on a per slide basis by binding to the <code>data-state</code> name.
+					</p>
+					<pre><code class="javascript" data-trim contenteditable style="font-size: 18px;">
+Reveal.on( 'customevent', function() {
+	console.log( '"customevent" has fired' );
+} );
+					</code></pre>
+				</section>
+
+				<section>
+					<h2>Take a Moment</h2>
+					<p>
+						Press B or . on your keyboard to pause the presentation. This is helpful when you're on stage and want to take distracting slides off the screen.
+					</p>
+				</section>
+
+				<section>
+					<h2>Much more</h2>
+					<ul>
+						<li>Right-to-left support</li>
+						<li><a href="https://revealjs.com/api/">Extensive JavaScript API</a></li>
+						<li><a href="https://revealjs.com/auto-slide/">Auto-progression</a></li>
+						<li><a href="https://revealjs.com/backgrounds/#parallax-background">Parallax backgrounds</a></li>
+						<li><a href="https://revealjs.com/keyboard/">Custom keyboard bindings</a></li>
+					</ul>
+				</section>
+
+				<section style="text-align: left;">
+					<h1>THE END</h1>
+					<p>
+						- <a href="https://slides.com">Try the online editor</a> <br>
+						- <a href="https://github.com/hakimel/reveal.js">Source code &amp; documentation</a>
+					</p>
+				</section>
+
+			</div>
+
+		</div>
+
+		<script src="dist/reveal.js"></script>
+		<script src="plugin/zoom/zoom.js"></script>
+		<script src="plugin/notes/notes.js"></script>
+		<script src="plugin/search/search.js"></script>
+		<script src="plugin/markdown/markdown.js"></script>
+		<script src="plugin/highlight/highlight.js"></script>
+		<script>
+
+			// Also available as an ES module, see:
+			// https://revealjs.com/initialization/
+			Reveal.initialize({
+				controls: true,
+				progress: true,
+				center: true,
+				hash: true,
+
+				// Learn about plugins: https://revealjs.com/plugins/
+				plugins: [ RevealZoom, RevealNotes, RevealSearch, RevealMarkdown, RevealHighlight ]
+			});
+
+		</script>
+
+	</body>
+</html>