Add: Strings and characters
Update
初步完成 Using Swift with Cocoa and Objective-C 第三章
修复图片链接
Merge pull request #10 from wh1100717/gh-pages

Strings and Characters 02/03
Merge pull request #12 from honghaoz/develop

complete Naming Constants and Printing Constants
Update README.md
Update README.md
Merge pull request #11 from haolloyin/translate

Translate
add article 02/03
merged