chore: add more info to README

Author: kiaking

README.md

@@ -1,13 +1,21 @@
-# Vuex [![Build Status](https://circleci.com/gh/vuejs/vuex/tree/dev.png?style=shield)](https://circleci.com/gh/vuejs/vuex)
+# Vuex
 
-> Centralized State Management for Vue.js.
+[![npm](https://img.shields.io/npm/v/vuex.svg)](https://npmjs.com/package/vuex)
+[![ci status](https://circleci.com/gh/vuejs/vuex/tree/dev.png?style=shield)](https://circleci.com/gh/vuejs/vuex)
 
-<p align="center">
-  <img width="700px" src="https://raw.githubusercontent.com/vuejs/vuex/dev/docs/.vuepress/public/vuex.png">
-</p>
+---
 
-- [What is Vuex?](https://vuex.vuejs.org/)
-- [Full Documentation](http://vuex.vuejs.org/)
+:fire: **HEADS UP!** You're currently looking at Vuex 3 branch. If you're looking for Vuex 4, [please check out `4.0` branch](https://github.com/vuejs/vuex/tree/4.0).
+
+---
+
+Vuex is a state management pattern + library for Vue.js applications. It serves as a centralized store for all the components in an application, with rules ensuring that the state can only be mutated in a predictable fashion. It also integrates with Vue's official [devtools extension](https://github.com/vuejs/vue-devtools) to provide advanced features such as zero-config time-travel debugging and state snapshot export / import.
+
+Learn more about Vuex at "[What is Vuex?](https://vuex.vuejs.org/)", or get started by looking into [full documentation](http://vuex.vuejs.org/).
+
+## Documentation
+
+To check out docs, visit [vuex.vuejs.org](https://vuex.vuejs.org/).
 
 ## Examples
 
@@ -19,15 +27,33 @@
 
 Running the examples:
 
-``` bash
+```bash
 $ npm install
 $ npm run dev # serve examples at localhost:8080
 ```
 
+## Questions
+
+For questions and support please use the [Discord chat server](https://chat.vuejs.org) or [the official forum](http://forum.vuejs.org). The issue list of this repo is **exclusively** for bug reports and feature requests.
+
+## Issues
+
+Please make sure to read the [Issue Reporting Checklist](https://github.com/vuejs/vuex/blob/dev/.github/contributing.md#issue-reporting-guidelines) before opening an issue. Issues not conforming to the guidelines may be closed immediately.
+
+## Changelog
+
+Detailed changes for each release are documented in the [release notes](https://github.com/vuejs/vuex/releases).
+
+## Stay In Touch
+
+For latest releases and announcements, follow on Twitter: [@vuejs](https://twitter.com/vuejs).
+
 ## Contribution
 
 Please make sure to read the [Contributing Guide](https://github.com/vuejs/vuex/blob/dev/.github/contributing.md) before making a pull request.
 
 ## License
 
 [MIT](http://opensource.org/licenses/MIT)
+
+Copyright (c) 2015-present Evan You