support for standalone multiplexing

plugin/multiplex/index.js

@@ -31,7 +31,15 @@ io.on( 'connection', function( socket ) {
 
 app.get("/", function(req, res) {
 	res.writeHead(200, {'Content-Type': 'text/html'});
-	fs.createReadStream(opts.baseDir + '/index.html').pipe(res);
+
+	var stream = fs.createReadStream(opts.baseDir + '/index.html');
+	stream.on('error', function( error ) {
+		res.write('<style>body{font-family: sans-serif;}</style><h2>reveal.js multiplex server.</h2><a href="/token">Generate token</a>');
+		res.end();
+	});
+	stream.on('readable', function() {
+		stream.pipe(res);
+	});
 });
 
 app.get("/token", function(req,res) {

plugin/multiplex/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "reveal-js-multiplex",
+  "version": "1.0.0",
+  "description": "reveal.js multiplex server",
+  "homepage": "http://lab.hakim.se/reveal-js",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "engines": {
+    "node": "~4.1.1"
+  },
+  "dependencies": {
+    "express": "~4.13.3",
+    "grunt-cli": "~0.1.13",
+    "mustache": "~2.2.1",
+    "socket.io": "~1.3.7"
+  },
+  "license": "MIT"
+}