RLP serialization for OCaml

RLP is a way to encode trees into a byte string. The encoded trees are muti-way trees with byte strings as leaves.

Such a tree lives in a type t, and this library can encode such a tree into a byte string (represented by Rope.t). The library provides encode : t -> Rope.t and decode : Rope.t -> t, where decode(encode a) should be equal to a.

# Rope.to_string Rlp.(encode (RlpList [RlpData (Rope.of_string "aa"); RlpList []]));;
- : string = "\196\130aa\192"
# Rlp.(display (decode (Rope.of_string "\196\130aa\192")));;
- : string = "[\"aa\", []]"