Begin to translate.
Finished Whitespace and comments, Identifiers, Keywords.
Merge branch 'gh-pages' of https://github.com/numbbbbb/the-swift-programming-language-in-chinese into develop

# By Hawstein (18) and others
# Via 梁杰 (9) and others
* 'gh-pages' of https://github.com/numbbbbb/the-swift-programming-language-in-chinese: (88 commits)
  update 03/07
  03/06 refine
  03/06 Done
  03/06 declaration attributes Done
  03/06 half done
  03/06 objc attribute done.
  03/06 refine
  03/06 Done
  03/06 declaration attributes Done
  03/06 half done
  update new articles
  Update README.md
  Update README.md
  Update 01_swift.md
  下标 Subscripts 翻译完成
  03/06 objc attribute done.
  又多翻了一点 还有一个小小节
  Update README.md
  update 02/08
  Update README.md
  ...
Finished!
Merge pull request #73 from superkam/develop

Finished Whitespace and comments, Identifiers, Keywords.