update reference pages
update reference pages
merge changes
update ARC, fix some bugs & typing errors
Merge pull request #138 from yulingtianxia/develop

Update ARC
Merge pull request #137 from TimothyYe/develop

Develop
Update 01_swift.html

just test github
Merge pull request #139 from peiyucn/gh-pages

Update 01_swift.html
Update 02_Basic_Operators.html

Fixed a typo
Fixed #136: Typos in chap2.6
[2.1基础部分] : 把非代码部分的英文括号修改成中文括号，修改部分错别字
test swift syntax hightlighting
return to former syntax
Merge pull request #143 from lzw120/gh-pages

Update 02_Basic_Operators.html
Merge pull request #145 from yankuangshi/develop

[2.1基础部分] : 把非代码部分的英文括号修改成中文括号，修改部分错别字
Merge pull request #144 from umcsdon/gh-pages

Fixed #136: Typos in chap2.6
make gitbook
Update README.md