Modify The README.md and Add How to Usage at README.md file

Signed-off-by: feimyy <feimyy@hotmail.com>
Implement single port scan and It is a single thread program

完成单端口扫描,目前还是为单线程扫描

Signed-off-by: feimyy <feimyy@hotmail.com>
Merge pull request #1 from feimyy/feimyy

Feimyy