为过时方法添加说明。
Merge pull request #98 from BluntBlade/master

为过时方法添加说明。
Merge pull request #97 from dp90219/master

去除generate_upload_token 中旧的async_options, 添加 persistent_ops
a mistake. change `params[:persistent_ops]` to `params[:persistentOps]` and so on
Merge branch 'master' of https://github.com/dp90219/ruby-sdk