1.2.6

1. Resolve the issue of SSHCommandError exception not being properly handled. #1
2. Fix the issue where the output would include automatically appended commands when a command failed (the "automatically appended command" is the solution used to determine the success of the current command). #2
3. Improve the optional parameter auto_sudo (whether to automatically prepend the sudo command to the command) by only applying it when the remote user is not the root user (the sudo command will only be added to the command if the remote user is not root). #3
4. Improve the SSHCommandError exception class by changing its inheritance from Exception to paramiko.SSHException.
5. Refactor (improve) the method of obtaining version information in the setup by directly extracting it from package.__doc__ instead of opening a file.
6. Make some other small optimizations.
7. Adjust the open-source library category information on PyPi.
8. Update the README file.

1.解决 SSHCommandError 异常无法被妥善处理的问题。#1
2.修复当命令异常时输出中会包含自动追加的命令的问题（“自动追加的命令” 是用于判断当前命令是否执行成功的方案）。#2
3.改进可选参数 auto_sudo （是否在命令前自动添加 sudo 指令），只有当远程用户不是 root 用户时该参数才会生效（才会在命令前添加 sudo 指令）。#3
4.改进 SSHCommandError 异常类，从继承 Exception 改为继承 paramiko.SSHException。
5.重构（改进） setup 中获得版本信息的方案，直接从 package.__doc__ 中提取，而不再打开文件。
6.其它一些小的优化。
7.调整在PyPi上的开源库分类信息。
8.更新自述文件。