remove engine.io

No need for homepage to show this stuff for now. Just more things that
can crash the tunnel server!

static/js/index.js

@@ -1,27 +1 @@
-var eio = require('engine.io-client');
-var flipCounter = require('flip-counter');
-
-var user_counter = new flipCounter('user-count', {
-    value: 0,
-    pace: 10,
-    fW: 30,
-    tFH: 20,
-    bFH: 40,
-    bOffset: 200,
-    auto: false
-});
-
-var socket = eio();
-socket.on('open', function () {});
-
-socket.on('message', function (data) {
-    var msg = JSON.parse(data);
-    user_counter.incrementTo(msg.tunnels);
-});
-
-socket.on('close', function () {
-    user_counter.incrementTo(0);
-});
-
-// load google analytics after above starts
 require('./ga');