simplify GitHub readme page

Author: billryan

README.md

@@ -4,121 +4,36 @@
 [![Slack Status](https://slackin4ds-algo.herokuapp.com/badge.svg)](https://slackin4ds-algo.herokuapp.com/)
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-- English via [Data Structure and Algorithm notes](http://algorithm.yuanbin.me/en/index.html)
-- 简体中文请戳 [数据结构与算法/leetcode/lintcode题解](http://algorithm.yuanbin.me/zh-hans/index.html)
-- 繁體中文請瀏覽 [資料結構與演算法/leetcode/lintcode題解](http://algorithm.yuanbin.me/zh-tw/index.html)
+This book is some notes on learning data structure and algorithm. It was written in Simplified Chinese but other languages such as English and Traditional Chinese are work in progress.
 
-## Introduction
+- [English](https://algorithm.yuanbin.me/en/), seldom updated
+- [简体中文](https://algorithm.yuanbin.me/zh-hans/), frequently updated
+- [繁體中文](https://algorithm.yuanbin.me/zh-tw/), seldom updated
 
-This work is some notes of learning and practicing data structures and algorithm. 
+## Introduction
 
-1. Part I is some brief introduction of basic data structures and algorithm, such as, linked lists, stack, queues, trees, sorting and etc.
+1. Part I is some brief introduction of basic data structures and algorithm, such as linked lists, stack, queues, trees, sorting.
 2. Part II is the analysis and summary of programming problems, and most of the programming problems come from <https://leetcode.com/>, <http://www.lintcode.com/>, <http://www.geeksforgeeks.org/>, <http://hihocoder.com/>, <https://www.topcoder.com/>.
 3. Part III is the appendix of resume and other supplements.
 
-This project is hosted on <https://github.com/billryan/algorithm-exercise> and rendered by [Gitbook](https://www.gitbook.com/book/yuanbin/algorithm/details). You can star the repository on the GitHub to keep track of updates. Another choice is to subscribe channel `#github_commit` via Slack <https://ds-algo.slack.com/messages/github_commit/>. ~~RSS feed is under development.~~
+This project is hosted on <https://github.com/billryan/algorithm-exercise> and rendered by [GitBook](https://www.gitbook.com/book/yuanbin/algorithm/details). You can star the repository on the GitHub to keep track of updates. Another choice is to subscribe channel `#github_commit` via Slack <https://ds-algo.slack.com/messages/github_commit/>.
 
-Feel free to access <http://slackin4ds-algo.herokuapp.com> for Slack invite automation.
+Feel free to access <http://slackin4ds-algo.herokuapp.com> with Slack invite automation.
 
 You can view/search this document online or offline, feel free to read it. :)
 
-- Online(Rendered by Gitbook): <http://algorithm.yuanbin.me>
-- Offline(Compiled by Gitbook and Travis-CI):
-    1. EPUB: [GitHub](https://github.com/sign4bill/algorithm-exercise/tree/deploy/epub), [Gitbook](https://www.gitbook.com/download/epub/book/yuanbin/algorithm), [七牛 CDN(中国大陆用户适用)](http://7xojrx.com1.z0.glb.clouddn.com/docs/algorithm-exercise/index.html) - Recommended for iPhone/iPad/MAC
-    2. PDF: [GitHub](https://github.com/sign4bill/algorithm-exercise/tree/deploy/pdf), [Gitbook](https://www.gitbook.com/download/pdf/book/yuanbin/algorithm), [七牛 CDN(中国大陆用户适用)](http://7xojrx.com1.z0.glb.clouddn.com/docs/algorithm-exercise/index.html) - Recommended for Desktop
-    3. MOBI: [GitHub](https://github.com/sign4bill/algorithm-exercise/tree/deploy/mobi), [Gitbook](https://www.gitbook.com/download/mobi/book/yuanbin/algorithm), [七牛 CDN(中国大陆用户适用)](http://7xojrx.com1.z0.glb.clouddn.com/docs/algorithm-exercise/index.html) - Recommended for Kindle
-- Site Search via Google: `keywords site:algorithm.yuanbin.me`
-- Site Search via Swiftype: Click `Search this site` on the right bottom of webpages
+- Online(Rendered by GitBook): <https://algorithm.yuanbin.me>
+    - Site Search via Google: `keywords site:algorithm.yuanbin.me`
+    - Site Search via Algolia: Click `Type to search` on the top left corner of webpages
+- Offline(Compiled by GitBook on Travis-CI): ePub, PDF, MOBI
 
 ## License
 
 This work is licensed under the **Creative Commons Attribution-ShareAlike 4.0 International License**. To view a copy of this license, please visit <http://creativecommons.org/licenses/by-sa/4.0/>
 
-## Contribution
-
-- [English](http://algorithm.yuanbin.me/en/index.html) is maintained by [@billryan](https://github.com/billryan)
-- [简体中文](http://algorithm.yuanbin.zh-hans/index.html) is maintained by [@billryan](https://github.com/billryan), [@Shaunwei](https://github.com/Shaunwei)
-- [繁體中文](http://algorithm.yuanbin.me/zh-tw/index.html) is maintained by [@CrossLuna](https://github.com/CrossLuna)
-
-Other contributors can be found in [Contributors to algorithm-exercise](https://github.com/billryan/algorithm-exercise/graphs/contributors)
-
-### Donation
-
-本项目接受捐赠，形式不限，可以买书，可以寄明信片，还可以赠送七牛流量券，也可以金额打赏 :)
-
-#### 邮寄明信片
-
-@billryan 喜欢收集各种明信片，来者不拒~ 邮寄的话可以邮寄至 `上海市闵行区上海交通大学闵行校区电院群楼5号楼307`，收件人：`袁斌`。
-
-#### 送书
-
-除了邮寄明信片，你还可以买本书送给各位贡献者，@billryan 的地址见上节。
-
-#### 支付宝
-
-![支付宝打赏](./shared-files/images/alipay_billryan_qr15x15.jpg)
-
-账户名：yuanbin2014(at)gmail.com 金额随意
-
-#### Wechat
-
-![Red Packet](./shared-files/images/wechat_billryan_qr15x15.jpg)
-
-金额随意
-
-#### PayPal
-
-账户名：yuanbin2014(at)gmail.com 金额随意，付款时选择 friends and family
-
-隐私考虑，以下名单隐去了部分个人信息，有些名单若没来得及添加，可私下联系我加上，有些信息和金额因为时间久远可能有误，欢迎指正。
-
-- 2015-09-16 支付宝 `taoli***@gmail.com` 20
-- 2015-10-30 支付宝 `张亚*` 6.66
-- 2015-11-19 支付宝 `wen***@126.com` 10
-- 2015-12-25 支付宝 `石*` 50
-- 2016-01-05 支付宝 `she***@163.com` 10
-- 2016-01-24 支付宝 `187****2296` 20
-- 2016-01-15 支付宝 `136****0794` 20
-- 2016-03-08 支付宝 `don***@163.com` 5
-- 2016-03-21 支付宝 `129***@qq.com` 50
-- 2016-07-31 支付宝 `130****9675` 5
-- 2016-08-16 PayPal `Tong W***` 20 $
-- 2016-08-21 支付宝 `ee.***@gmail.com` 6.66
-- 2016-10-09 支付宝 `abc***@126.com` 6.66
-- 2016-09-01 明信片 `liaowen***@163.com`
-- 2016-10-19 微信 6.66
-- 2016-10-13 支付宝 `182****9133` 5
-- 2016-11-17 支付宝 `tf.***@gmail.com` 10.24
-- 2016-11-19 支付宝 `jat***@163.com` 20
-- 2016-11-20 支付宝 `bao***@163.com` 10
-- 2017-01-01 明信片 Berkeley CA USA - (智识)知识是不满足守恒律的事物
-- 2017-01-09 微信 20
-- 2017-01-20 支付宝 `xin***@sina.com` 10
-- 2017-02-21 微信 10
-- 2017-03-15 微信 10
-- 2017-04-07 微信 10
-- 2017-04-18 明信片 - @CrossLuna 非常感谢来自台湾的小伙伴维护繁体中文
-- 2017-07-08 微信 13.14 - @盈盈 :)
-- 2017-08-08 支付宝 `mut***@gmail.com` 10
-- 2017-09-18 支付宝 `far***@sina.com` 66.66
-- 2017-10-07 支付宝 `277***@qq.com` 6.08
-- 2017-10-23 微信 6.66 # 加油啊!
-- 2017-10-26 微信 10
-- 2017-12-26 微信 50
-- 2017-12-01 支付宝 `angel********@qq.com` 5
-- 2018-01-13 微信 10
-- 2018-02-25 支付宝 `111***@qq.com` 1
-- 2018-03-09 微信 16.66 # 非常感谢算法项目!
-- 2018-03-12 支付宝 `189*******91` 10
-
-所得捐款用于七牛 CDN 流量付费/激励 Contributors 写出更好的内容/购买书籍/西瓜/饮料
-
 ## To Do
 
-- [ ] add multiple languages support, currently 繁體中文, 简体中文 are available
-- [x] explore nice writing style
-- [x] add implementations of `Python`, `C++`, `Java` code
+- [ ] add multiple languages support
+- [ ] add implementations of `Python`, `C++` and `Java` code
 - [x] add time and space complexity analysis
-- [x] summary of basic data structure and algorithm
-- [x] add CSS for online website <http://algorithm.yuanbin.me>
 - [x] add proper Chinese fonts for PDF output