A general purpose async session for node.js

this package is created for project [aex](https://github.com/calidion/aex), but it is general to all node.js http processing.
It is on it’s early stage, any contribution is appriciated.

It provide abstract class Store and Session.
Currently only MemoryStore and CookieSession are available.

You can check the project at [https://github.com/aex-ts-node/session](https://github.com/aex-ts-node/session).

Usage:

import { MemoryStore, Cookie } from “@aex/session”;
import * as http from “http”;
const store = new MemoryStore();
const cookie = new Cookie(store);
const scope: any = {};
const server = http.createServer(function(req: any, res: any) {
   cookie.parse(req, res, scope).then(() => {
   scope.session.user = “alice”;
   res.write(“Hello World!”);
   res.end();
 });
}).listen(port);