Fixed #148
Fixed #142
new branch to rebase
Add swift highlight
add highlight to chapter 1.2

add swift highlight
Merge pull request #150 from zac1st1k/gh-pages

Add swift highlight to chapter 1.2
Merge pull request #149 from xielingwang/proofreading

new branch to rebase:语法总结
修改02_Lexical_Structure.md里的代码块标示
添加swift标签source/chapter2/23_Advanced_Operators.md
添加swift标签:06_Functions.md
Merge pull request #151 from IceskYsl/gh-pages

修改02_Lexical_Structure.md里的代码块标示
make gitbook
make gitbook
Update README.md
remove bottom link of 08_Generic_Parameters_and_Arguments
add [expression] header links
remote extra html file
correct [expressions] binary expressions header link
2.3 章节 字符串和字符（Strings and Characters）一处引号错误
Merge pull request #157 from stanzhai/develop

完善一些细节