delete the error part
delete the error page
Merge pull request #13 from honghaoz/translate-swift

Capitalised "Chinese"
Added "Functions" Chapter. Rename some files.

Added "Functions" Chapter,
Rename some files.
Each chapter has one corresponding file.
merged
Merge branch 'translate-swift' of https://github.com/honghaoz/the-swift-programming-language-in-chinese into translate-swift