first para
add some origin
Add: Closures
修改错字和排版
Update: Closures
Update
Update: 运算符函数
开始“集合类型”章节翻译
add content of ARC
Merge pull request #27 from TimothyYe/develop

add content of ARC
add arc content
bug fix
Merge pull request #29 from TimothyYe/gh-pages

勘误
update arc content
开始“集合类型”章节翻译
Merge branch 'develop' of https://github.com/shinyzhu/the-swift-programming-language-in-chinese into develop
Update README.md
Update README.md
控制流地一段
Update README.md