OCaml fifo

This interpreter relies on ocaml by default, but has been confirmed to work with utop in normal (non-REPL) mode.

The default interpreter can be changed relatively safely for normal (non-REPL) mode:

require'sniprun'.setup({
    interpreter_options = {
        OCaml_fifo = {
             interpreter = "utop"
            }
        }
    }
})

REPL-like behavior

require'sniprun'.setup({
    repl_enable = { "OCaml_fifo" }
})