Update to reveal.js 4.6.1

Change-Id: I566737c50b93dd8c094ad3c3fa59865260b3b4ba
diff --git a/inst/reveal.js-4.6.1/test/test-pdf.html b/inst/reveal.js-4.6.1/test/test-pdf.html
new file mode 100644
index 0000000..8fa102a
--- /dev/null
+++ b/inst/reveal.js-4.6.1/test/test-pdf.html
@@ -0,0 +1,97 @@
+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - Test PDF exports</title>
+
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../node_modules/qunit/qunit/qunit.css">
+		<script src="../node_modules/qunit/qunit/qunit.js"></script>
+	</head>
+
+	<body style="overflow: auto;">
+
+		<div id="qunit"></div>
+  		<div id="qunit-fixture"></div>
+
+		<div class="reveal" style="display: none;">
+
+			<div class="slides">
+
+				<section>
+					<h1>1</h1>
+					<img data-src="">
+				</section>
+
+				<section>
+					<section>
+						<h1>2.1</h1>
+					</section>
+					<section>
+						<h1>2.2</h1>
+					</section>
+					<section>
+						<h1>2.3</h1>
+					</section>
+				</section>
+
+				<section id="fragment-slides">
+					<section>
+						<h1>3.1</h1>
+						<ul>
+							<li class="fragment">4.1</li>
+							<li class="fragment">4.2</li>
+							<li class="fragment">4.3</li>
+						</ul>
+					</section>
+
+					<section>
+						<h1>3.2</h1>
+						<ul>
+							<li class="fragment" data-fragment-index="0">4.1</li>
+							<li class="fragment" data-fragment-index="0">4.2</li>
+						</ul>
+					</section>
+
+					<section>
+						<h1>3.3</h1>
+						<ul>
+							<li class="fragment" data-fragment-index="1">3.3.1</li>
+							<li class="fragment" data-fragment-index="4">3.3.2</li>
+							<li class="fragment" data-fragment-index="4">3.3.3</li>
+						</ul>
+					</section>
+				</section>
+
+				<section>
+					<h1>4</h1>
+				</section>
+
+			</div>
+
+		</div>
+
+		<script src="../dist/reveal.js"></script>
+		<script>
+			QUnit.config.testTimeout = 30000;
+			QUnit.config.autostart = false;
+
+			Reveal.initialize({ pdf: true }).then( function() {
+
+				QUnit.start();
+
+				// Only one test for now, we're mainly ensuring that there
+				// are no execution errors when running PDF mode
+
+				QUnit.test( 'Reveal.isReady', function( assert ) {
+					assert.strictEqual( Reveal.isReady(), true, 'returns true' );
+				});
+
+			} );
+
+		</script>
+
+	</body>
+</html>