XEngine_Storage V2.2 Released

修正:发送失败没有计算大小的问题
修正:广播消息其他机器无法接受的问题
修正:断下续传问题
修改:等待时间现在为微秒了
修改:可以通过查询得到下载URL
增加:支持发送错误重试次数设置
增加:OPTIONS方法支持,可用于心跳
增加:为管理API增加创建,删除和查询方法
增加:下载动态速率支持

Fixed:not cal size with send failed
Fixed:Can not receive broadcast messages on other machines
Fixed:download resume pos not work
Modify:wait time is microseconds now.
Modify:can be download by query url
Added:Support setting the number of retry errors
Added:OPTIONS Method is supported.can use to heartbeat
Added:create and delete and query management api for dir
Added:dynamic rate first Version