Pyserssh

PyserSSH15.py is V1.5 from [Gist](https://gist.github.com/damp11113/610c516f7236752366d320b78b2ec618)
PyserSSH12.py is V1.2 from ...

add demo to library by using `python -m PyserSSH` for try to use PyserSSH

Add new account autosave and autoload
Fix timeout keep disconnect on wait input/key/choose

sory forgot change version in library from 4.2 to 4.3 💀

New extension
- Dialog
- MoreDisplay
- XHandler
Fix
- improved performance

New
- History command
- X11
- Compression

New event
- error (error handle)
- connectpty
- resized
- auth

New extensions
- processbar (modify from [damp11113-library](https://github.com/damp11113/damp11113-library))

Fix
- improved performance
- fix ^H backspace on mobaxtem

Legacy