Structural overhaul, generate both ciphers from one input instead of hand-rolling both.
Turns out there's an existing function for that.

Also, pipeline for clarity, and ignore here because we aren't getting
useful output from our handler anyway.
Drop ignores due to map->iter change and previous commit.
Add fizzbuzz.ml
Handle file-opening errors.
Add permutations.ml
Whoops.
Added jotnote.sh