Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,38 +1,27 @@
 How to contribute
 =================
 
-在你提交问题前，请先[自行诊断]一下。提交时附上诊断过程中的问题和下列结果，
-否则如果我们无法重现你的问题，也就不能帮助你。
+Pull Requests
+-------------
 
-Before you submit issues, please read [Troubleshooting] and take a few minutes
-to read this guide.
-
-问题反馈
--------
-
-请提交下面的信息：
-
-1. 你是如何搭建环境的？（操作系统，Shadowsocks 版本）
-2. 操作步骤是什么？
-3. 浏览器里的现象是什么？一直转菊花，还是有提示错误？
-4. 发生错误时，客户端和服务端最后一部分日志。
-5. 其它你认为可能和问题有关的信息。
-
-如果你不清楚其中某条的含义， 可以直接跳过那一条。
+1. Pull requests are welcome. If you would like to add a large feature
+or make a significant change, make sure to open an issue to dicuss with
+people first.
+2. Follow PEP8.
+3. Make sure to pass the unit tests. Write unit tests for new modules if
+needed.
 
 Issues
 ------
 
-Please include the following information in your submission:
-
-1. How did you set up your environment? (OS, version of Shadowsocks)
-2. Steps to reproduce the problem.
-3. What happened in your browser? Just no response, or any error message?
-4. 10 lines of log on the local side of shadowsocks when the error happened.
-5. 10 lines of log on the server side of shadowsocks when the error happened.
-6. Any other useful information.
+1. Only bugs and feature requests are accepted here.
+2. We'll only work on important features. If the feature you're asking only
+benefits a few people, you'd better implement the feature yourself and send us
+a pull request, or ask some of your friends to do so.
+3. We don't answer questions of any other types here. Since very few people
+are watching the issue tracker here, you'll probably get no help from here.
+Read [Troubleshooting] and get help from forums or [mailing lists].
 
-Skip any of them if you don't know its meaning.
 
 [Troubleshooting]: https://github.com/clowwindy/shadowsocks/wiki/Troubleshooting
-[自行诊断]:        https://github.com/clowwindy/shadowsocks/wiki/Troubleshooting
+[mailing lists]:   https://groups.google.com/forum/#!forum/shadowsocks