README.md: file updated for rtl support

fa/README.md

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 # دونیت
 
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 AliPay: <img src="../zh/images/alipay.png" alt="alipay" width="100" height="100">
 
 English Donate:[donate](http://beego.me/donate)
 
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 ## جامعه
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 QQ群：386056972
 
 BBS：[http://gocn.io/](http://gocn.io/)
 
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 ### تقدیر و تشکر
 
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  - [四月份平民 April Citizen](https://plus.google.com/110445767383269817959) (review code)
  - [洪瑞琦 Hong Ruiqi](https://github.com/hongruiqi) (review code)
  - [边  疆 BianJiang](https://github.com/border) (write the configurations about Vim and Emacs for Go development)
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  - [北极星 Polaris](https://github.com/polaris1119)(review whole book)
  - [雨  痕 Rain Trail](https://github.com/qyuhen)(review chapter 2 and 3)
 
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 ### مجوز
 
 لازم است بدانید که این کتاب تحت مجوز [CC BY-SA 3.0 License](http://creativecommons.org/licenses/by-sa/3.0/) قرار دارد،