Add support for proto-repl

[indigo0086]

I use proto-repl in atom and due to it not having a proper file extension parinfer doens't activate when I'm using it. Is it possible to set it up so that parinfer works for the popular atom repl plugins?

[oakmac]

I'm not sure if this will address your specific issue, but this page might be helpful if you haven't seen it already.