* contrib/lisp/org-export.el (org-export-expand-include-keyword): Use
another optional argument to specify the current working directory.
(org-export-as): Apply changes.
* testing/contrib/lisp/test-org-export.el: Add tests.
* testing/examples/include.org: New test file.
* testing/examples/include2.org: New test file.
Nicolas Goaziou