Revert "rename for weibo account"

This reverts commit 7c9157d.

README.md

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 Swift 语言指南
 ===
-> <span style="color:lightgray;font-size:12px">[@Swift指南](http://weibo.com/swiftlanguage) 更新于 2016-3-21，更新内容详见 [Issue 49](https://github.com/ipader/SwiftGuide/blob/master/weekly/Issue-49.md)。往期更新回顾详见《[收录周报](https://github.com/ipader/SwiftGuide/blob/master/weekly/README.md)》</span>
+> <span style="color:lightgray;font-size:12px">[@SwiftLanguage](http://weibo.com/swiftlanguage) 更新于 2016-3-21，更新内容详见 [Issue 49](https://github.com/ipader/SwiftGuide/blob/master/weekly/Issue-49.md)。往期更新回顾详见《[收录周报](https://github.com/ipader/SwiftGuide/blob/master/weekly/README.md)》</span>
 
 　　[这份指南](https://github.com/ipader/SwiftGuide/blob/master/2014%20letter.md)汇集了 Swift 语言主流学习资源，并以开发者的视角整理编排。对于精选项目及文章，可直接访问《[Swift 项目精选](https://github.com/ipader/SwiftGuide/blob/master/Featured.md)》和《[Swift 文章精选](https://github.com/ipader/SwiftGuide/blob/master/Featured-Articles.md)》。