Fix typo, diction of README, update opam links

README.md

@@ -1,20 +1,20 @@
-This repository contains OCaml package and compiler meta-data and are
-used by the default installations of [OPAM](http://opam.ocaml.org).
+This repository contains OCaml package and compiler metadata and is
+used by the default installation of [OPAM](https://opam.ocaml.org/).
 
 ## How to Contribute
 
-You are welcome to clone this repository and send us back pull
-requests. You can find more documentation and useful work-flows on
-http://opam.ocaml.org.
+You are welcome to clone this repository and send us pull
+requests. You can find more documentation and useful work-flows at
+[https://opam.ocaml.org](https://opam.ocaml.org/).
 
 ## License
 
-All the metadata contained in that repository are licensed under the
+All the metadata contained in this repository are licensed under the
 [CC0 1.0 Universal](http://creativecommons.org/publicdomain/zero/1.0/)
 license.
 
-Moreover, as the collection of the meta-data in this repository is
+Moreover, as the collection of the metadata in this repository is
 technically a "Database" -- which is subject to a "sui generis" right
-in Europe -- we would like to stress out than even the *collection* of
-the metadata contained in opam-repository is in CC0 and thus the
-simple act of cloning opam-repository is perfectly legal.
+in Europe -- we would like to stress that even the *collection* of
+the metadata contained in opam-repository is licensed under CC0 and
+thus the simple act of cloning opam-repository is perfectly legal.