Merge branch 'develop' into release/1.4.0

README.md

@@ -31,7 +31,7 @@ Then I will rewrite the GUI code in Swift.
 
 From [here](https://github.com/shadowsocks/ShadowsocksX-NG/releases/)
 
-## Fetures
+## Features
 
 - Use ss-local from shadowsocks-libev 2.5.6
 - Could Update PAC by download GFW List from GitHub.
@@ -64,6 +64,8 @@ Added global Keyboard shortcut <kbd>⌃</kbd> + <kbd>⌘</kbd> + <kbd>P</kbd> to
 
 ## Contributing 
 
+[![gitter](https://badges.gitter.im/Join Chat.svg)](https://gitter.im/ShadowsocksX-NG/Lobby)
+
 Contributions must be available on a separately named branch based on the latest version of the main branch develop.
 
 ref: [GitFlow](http://nvie.com/posts/a-successful-git-branching-model/)