Add shebang for npm install script

server.js

@@ -1,3 +1,5 @@
+#!/usr/bin/env node
+
 var express = require('express.io'),
     uuid = require('node-uuid'),
 
@@ -88,4 +90,4 @@ app.io.sockets.on('connection', function(socket) {
 
 app.listen(8080, function(){
   console.log('listening on *:8080');
-});
+});