清除了2个警告，见 #3 by xzlycandy

https://github.com/mengning/stream/pull/3
重写client和server的测试验证代码 #4 by USTC-KIRA

https://github.com/mengning/stream/pull/4
对client和server代码格式做了点修改
增加了html版本的代码帮助手册 #5 by KangKona

https://github.com/mengning/stream/pull/5
增加了tips_for_stream_using.pdf by阿帆提461320021@qq.com
更正README.md中的链接
Merge branch 'master' of https://github.com/xzlycandy/stream