edit css of homepage
Merge pull request #30 from SunLn/update_homepage_css

edit css of homepage
Merge branch 'master' of github.com:qiniu/developer.qiniu.com
补漏：301跳转改为303跳转。
Typo fixes in concepts section.
Merge pull request #32 from hughlv/master

Typo fixes in concepts section.
Fixed incorrect response format issue.
Misspelling of action.
Merge pull request #33 from hughlv/master

Fixed format of simple response.
Fixed inconsistent naming of persistent-op.
Merge pull request #34 from hughlv/master

Fixed inconsistent naming of persistent-op.
List issue in upload model.
Merge pull request #35 from hughlv/master

List issue in upload model.
Merge branch 'master' of github.com:qiniu/developer.qiniu.com
修正downloadToken的算法描述（#6363）。