Merge pull request #8 from SUTFutureCoder/master

FINISH the socket interface building.
	修改:         maintmp_ver3.py
	新文件:       readme.txt
Merge branch 'master' of github.com:bricksfx/gd_virtual_shell
接收到interrupt立刻停止当前客户端重新进行ssh连接，并且服务器重新进入监听状态
同样的客户端执行命令过程中有异常发生立刻做与接收到interrupt相同操作
	修改:         maintmp_ver3.py
Merge pull request #9 from SUTFutureCoder/master

ADD ! to interrupt the process
Merge pull request #10 from SUTFutureCoder/master

DELE the unnecessary files
BUG socket version