Merge pull request #1444 from OCamlPro/1.1

1.1 update (fix configure, install manpages, and bump version to 1.1.2)
Merge pull request #1449 from OCamlPro/1.1

Remove opam-check manpage and need for pandoc
Merge pull request #1459 from OCamlPro/1.1

Makefiles: proper handling of DESTDIR before PREFIX
Compat with ocamlfind package names 'dose' and 'dose3'