Added example.

OnlineEditorsExample/OnlineEditorsExampleNodeJS/helpers/cacheManager.js

@@ -0,0 +1,21 @@
+var cache = {};
+
+exports.put = function (key, value) {
+    cache[key] = value;
+}
+
+exports.containsKey = function (key) {
+    return typeof cache[key] != "undefined";
+}
+
+exports.get = function (key) {
+    return cache[key];
+}
+
+exports.delete = function (key) {
+    delete cache[key];
+}
+
+exports.clear = function () {
+    cache = {};
+}