Admin/ocaml/opam/README

update to pdfjs-5.4.149;

This is OPAM 2.0.3 -- the OCaml Package Manager.

The executables for x86_64-linux and x86_64-darwin are from
https://github.com/ocaml/opam/releases/tag/2.0.3

In order to work properly, the underlying OS platform needs to provide
standard build tools for C/OCaml development. Cygwin requires a separate
package "opam" version 2.0.x.


    Makarius
    23-Mar-2018