Fix ocamldoc test to follow new interface; add object type test

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@14907 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
minor: attribution information in Changes

(The changelog is not final, but it's nice to have not-too-incomplete
information in the next beta releases)

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@14908 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02