1.1.1

CHANGES:

• Hide C functions (sha3_keccakf) (@hannesm, #125)
• Use ocaml to run install.ml instead of a shebang (@Nymphium, #127)
• Use command -v instead of which (@Numphium, #126)
• Add @since meta-data in documentation (@c-cube, @dinosaure, #128)
• Update the README.md (@dinosaure, @mimoo, #130)
• ocaml-solo5 provides __ocaml_solo5__ instead of __ocaml_freestanding__ (@dinosaure, #131)