ab;aq
Merge pull request #120 from lintianzhi/feature/av_doc

ab;aq
Merge branch 'master' of github.com:qiniu/developer.qiniu.com
Merge pull request #121 from BluntBlade/master

修正文本错误。
Merge branch 'master' of github.com:qiniu/developer.qiniu.com
Resolution
Merge pull request #122 from lintianzhi/patch-3

Resolution
Merge branch 'master' of github.com:qiniu/developer.qiniu.com
修正响应码：404 -> 612。