Fix Review + WIP

[appsforartists]

Probably need to:

• move from subprocess.run to subprocess.Popen to make spawning of buffers work
  • If this works, can remove third_party/python36
• listen for stdin prompts and forward those to window.show_input_panel

[appsforartists]

Can't read/write to an interactive command more than once with p_open.communicate(input). 😢

Need to look into something like pexpect (or dissect how SublimeGit works)

[appsforartists]

https://pexpect.readthedocs.io/en/stable/?