Feature Request: Allow adding nuclide remote project paths

[kyldvs]

It would be great if this worked well with Nuclide and remote server development. Right now my projects.cson has remote files that look like this (substitute in your server's IP/port):

www:
  title: "www"
  paths: [
    "nuclide://127.0.0.1:8084/data/users/kyldvs/www"
  ]

When I switch to this project I always have to manually add this path back to the file-tree. Ideally it would be automatically added.

I'm not familiar enough with any of this to know whether this is something that would need to be added to this project or Nuclide itself, but I may try digging into it later.

[mehcode]

If this something we can support easily I'd be open to a PR.