add simplest possible express server to host files

...this is much better for development, so you can run many different servers
that have different HTML 5 local storages for testing purposes.

app.js

@@ -0,0 +1,12 @@
+var express=require("express");
+var http=require("http");
+
+var app=express();
+
+var port = process.env.PORT || 3000;
+app.set("port", port);
+app.use(express.static(__dirname));
+
+app.listen(port, function(){
+  console.log("Listening at: http://localhost:" + port);
+});