Ballons 博文翻译 by Arya
Update from OldCoder Oberyn

Revision更新到Beta4
Update from OldCoder Oberyn

完成了history revision的翻译，同时完成部分校对
Merge pull request #291 from oldcodeoberyn/gh-pages

Update from OldCoder Oberyn
Merge pull request #290 from littlekok/develop

Ballons 博文翻译 by Arya
8/14/ 9:55
Merge branch 'develop' of https://github.com/colourful987/the-swift-programming-language-in-chinese into develop