Implement windows version

[davidabs]

I would like to work on the windows version. Where need to be changed for this purpose?
Thanks

[vlad-shatskyi]

Hello, @davidabs. I'm not sure I can answer that question. Perhaps, path-related things require some tweaking. Maybe pty.js won't work as expected.

More importantly, before releasing 1.0 I'd like to change the codebase not thinking about compatibility with other operating system in order to speed up the development process. I'll merge your changes but I don't promise I won't break anything.

[arcanis]

Worth noting that it could be quite interesting to be able to run Windows 10's bash from inside black-screen.

[vlad-shatskyi]

Closing in favour of #800