Express addition

node_modules/promise/lib/finally.js

@@ -0,0 +1,16 @@
+'use strict';
+
+var Promise = require('./core.js');
+
+module.exports = Promise;
+Promise.prototype['finally'] = function (f) {
+  return this.then(function (value) {
+    return Promise.resolve(f()).then(function () {
+      return value;
+    });
+  }, function (err) {
+    return Promise.resolve(f()).then(function () {
+      throw err;
+    });
+  });
+};