Index: frontend/node_modules/on-finished/index.js
===================================================================
--- frontend/node_modules/on-finished/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/on-finished/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,234 @@
+/*!
+ * on-finished
+ * Copyright(c) 2013 Jonathan Ong
+ * Copyright(c) 2014 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict'
+
+/**
+ * Module exports.
+ * @public
+ */
+
+module.exports = onFinished
+module.exports.isFinished = isFinished
+
+/**
+ * Module dependencies.
+ * @private
+ */
+
+var asyncHooks = tryRequireAsyncHooks()
+var first = require('ee-first')
+
+/**
+ * Variables.
+ * @private
+ */
+
+/* istanbul ignore next */
+var defer = typeof setImmediate === 'function'
+  ? setImmediate
+  : function (fn) { process.nextTick(fn.bind.apply(fn, arguments)) }
+
+/**
+ * Invoke callback when the response has finished, useful for
+ * cleaning up resources afterwards.
+ *
+ * @param {object} msg
+ * @param {function} listener
+ * @return {object}
+ * @public
+ */
+
+function onFinished (msg, listener) {
+  if (isFinished(msg) !== false) {
+    defer(listener, null, msg)
+    return msg
+  }
+
+  // attach the listener to the message
+  attachListener(msg, wrap(listener))
+
+  return msg
+}
+
+/**
+ * Determine if message is already finished.
+ *
+ * @param {object} msg
+ * @return {boolean}
+ * @public
+ */
+
+function isFinished (msg) {
+  var socket = msg.socket
+
+  if (typeof msg.finished === 'boolean') {
+    // OutgoingMessage
+    return Boolean(msg.finished || (socket && !socket.writable))
+  }
+
+  if (typeof msg.complete === 'boolean') {
+    // IncomingMessage
+    return Boolean(msg.upgrade || !socket || !socket.readable || (msg.complete && !msg.readable))
+  }
+
+  // don't know
+  return undefined
+}
+
+/**
+ * Attach a finished listener to the message.
+ *
+ * @param {object} msg
+ * @param {function} callback
+ * @private
+ */
+
+function attachFinishedListener (msg, callback) {
+  var eeMsg
+  var eeSocket
+  var finished = false
+
+  function onFinish (error) {
+    eeMsg.cancel()
+    eeSocket.cancel()
+
+    finished = true
+    callback(error)
+  }
+
+  // finished on first message event
+  eeMsg = eeSocket = first([[msg, 'end', 'finish']], onFinish)
+
+  function onSocket (socket) {
+    // remove listener
+    msg.removeListener('socket', onSocket)
+
+    if (finished) return
+    if (eeMsg !== eeSocket) return
+
+    // finished on first socket event
+    eeSocket = first([[socket, 'error', 'close']], onFinish)
+  }
+
+  if (msg.socket) {
+    // socket already assigned
+    onSocket(msg.socket)
+    return
+  }
+
+  // wait for socket to be assigned
+  msg.on('socket', onSocket)
+
+  if (msg.socket === undefined) {
+    // istanbul ignore next: node.js 0.8 patch
+    patchAssignSocket(msg, onSocket)
+  }
+}
+
+/**
+ * Attach the listener to the message.
+ *
+ * @param {object} msg
+ * @return {function}
+ * @private
+ */
+
+function attachListener (msg, listener) {
+  var attached = msg.__onFinished
+
+  // create a private single listener with queue
+  if (!attached || !attached.queue) {
+    attached = msg.__onFinished = createListener(msg)
+    attachFinishedListener(msg, attached)
+  }
+
+  attached.queue.push(listener)
+}
+
+/**
+ * Create listener on message.
+ *
+ * @param {object} msg
+ * @return {function}
+ * @private
+ */
+
+function createListener (msg) {
+  function listener (err) {
+    if (msg.__onFinished === listener) msg.__onFinished = null
+    if (!listener.queue) return
+
+    var queue = listener.queue
+    listener.queue = null
+
+    for (var i = 0; i < queue.length; i++) {
+      queue[i](err, msg)
+    }
+  }
+
+  listener.queue = []
+
+  return listener
+}
+
+/**
+ * Patch ServerResponse.prototype.assignSocket for node.js 0.8.
+ *
+ * @param {ServerResponse} res
+ * @param {function} callback
+ * @private
+ */
+
+// istanbul ignore next: node.js 0.8 patch
+function patchAssignSocket (res, callback) {
+  var assignSocket = res.assignSocket
+
+  if (typeof assignSocket !== 'function') return
+
+  // res.on('socket', callback) is broken in 0.8
+  res.assignSocket = function _assignSocket (socket) {
+    assignSocket.call(this, socket)
+    callback(socket)
+  }
+}
+
+/**
+ * Try to require async_hooks
+ * @private
+ */
+
+function tryRequireAsyncHooks () {
+  try {
+    return require('async_hooks')
+  } catch (e) {
+    return {}
+  }
+}
+
+/**
+ * Wrap function with async resource, if possible.
+ * AsyncResource.bind static method backported.
+ * @private
+ */
+
+function wrap (fn) {
+  var res
+
+  // create anonymous resource
+  if (asyncHooks.AsyncResource) {
+    res = new asyncHooks.AsyncResource(fn.name || 'bound-anonymous-fn')
+  }
+
+  // incompatible node.js
+  if (!res || !res.runInAsyncScope) {
+    return fn
+  }
+
+  // return bound function
+  return res.runInAsyncScope.bind(res, fn, null)
+}