Update to reveal.js 4.1.2 (#136)

- New tools/ script to manually keep step for updates
- Plugins are all updated
- Template update following latest Pandoc version
- updated README for documentation
- Help page updated 
- See other change in NEWS file
diff --git a/inst/reveal.js-4.1.2/test/test-dependencies.html b/inst/reveal.js-4.1.2/test/test-dependencies.html
new file mode 100644
index 0000000..fdfe196
--- /dev/null
+++ b/inst/reveal.js-4.1.2/test/test-dependencies.html
@@ -0,0 +1,51 @@
+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - Test Dependencies</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>Slide content</section>
+
+			</div>
+
+		</div>
+
+		<script src="../dist/reveal.js"></script>
+		<script>
+			window.externalScriptSequence = '';
+
+			Reveal.initialize({
+				dependencies: [
+					{ src: 'assets/external-script-a.js' },
+					{ src: 'assets/external-script-b.js' },
+					{ src: 'assets/external-script-c.js' }
+				]
+			}).then( () => {
+
+				QUnit.module( 'Dependencies' );
+
+				QUnit.test( 'Load synchronous scripts', function( assert ) {
+					assert.strictEqual( window.externalScriptSequence, 'ABC', 'Loaded and executed in order' );
+				});
+
+			} );
+		</script>
+
+	</body>
+</html>