New brick backend?

[romanofski]

Hi!

I'm looking into adopting haskeline for our email client https://github.com/purebred-mua/purebred. It is using brick heavily and I found a great backend implementation done by @rootmos https://github.com/rootmos/haskeline. I don't know if he would be interested getting his code into haskeline (I'd help, thats why I'm filing this issue) or if the haskeline developers would consider opening the API for third party backend developers? What's the best approach from your side to release a new backend which integrates with brick?