added section about FLatted VS JSON

Author: WebReflection

README.md

@@ -24,6 +24,15 @@ a.push(a);
 stringify(a); // [["1","0"],{"a":"0"}]
 ```
 
+## Flatted VS JSON
+
+As it is for every other specialized format capable of serializing and deserializing circular data, you should never `JSON.parse(Flatted.stringify(data))`, and you should never `Flatted.parse(JSON.stringify(data))`.
+
+The only way this could work is to `Flatted.parse(Flatted.stringify(data))`, as it is also for _CircularJSON_ or any other, otherwise there's no granted data integrity.
+
+Also please note this project serializes and deserializes only data compatible with JSON, so that sockets, or anything else with internal classes different from those allowed by JSON standard, won't be serialized and unserialized as expected.
+
+
 ### New in V1: Exact same JSON API
 
   * Added a [reviver](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse#Syntax) parameter to `.parse(string, reviver)` and revive your own objects.