Plug in TLS support with ocaml-tls
Revamp TLS support: generalize and provide impl based on ocaml-tls.
Add .ocp-indent settings and reformat areas changed in this branch.
Minor refactoring in RSM.
Minor reformatting.
Remove last reference to ocaml-tls from RSM.

This will eventually allow to choose whether to build ocaml-tls support.
Compatibility with ocaml-tls HEAD (breaks build with 0.1.0).
Do not force client to have a certificate in RSM.
Merge branch 'tls'
Add usage notes to dict.ml example.
String.create -> Bytes.create