Merge branch 'master' of github.com:qiniu/developer.qiniu.com
Merge pull request #133 from BluntBlade/master

同步更新文档。
qrsbox cli mac download url change
Merge pull request #134 from longbai/modify_download_url

qrsbox cli mac download url change
Merge branch 'master' of github.com:BluntBlade/developer.qiniu.com
Merge branch 'master' of github.com:qiniu/developer.qiniu.com
add linux arm package
Merge pull request #135 from longbai/modify_download_url

add linux arm package
Merge branch 'master' of github.com:qiniu/developer.qiniu.com
修正Ruby SDK文档。