make geopub/leaflet a separate library

README.md

@@ -0,0 +1,40 @@
+# leaflet
+
+[leaflet] is an [OCaml] executable/library to TODO.
+
+## Installation
+
+`leaflet` can be installed with [opam]:
+
+```sh
+opam install leaflet
+```
+
+If you don't have `opam`, you can install it following the [how to install opam] guide.
+
+If you can't or don't want to use `opam`, consult the [opam file] for build instructions.
+
+## Quickstart
+
+```ocaml
+let () = Format.printf "TODO@."
+```
+
+For more, have a look at the [example] folder, at the [documentation] or at the [test suite].
+
+## About
+
+- [LICENSE]
+- [CHANGELOG]
+
+[CHANGELOG]: ./CHANGES.md
+[example]: ./example
+[LICENSE]: ./LICENSE.md
+[opam file]: ./leaflet.opam
+[test suite]: ./test
+
+[documentation]: TODO/leaflet
+[how to install opam]: https://opam.ocaml.org/doc/Install.html
+[OCaml]: https://ocaml.org
+[opam]: https://opam.ocaml.org/
+[leaflet]: TODO/leaflet