The default encoding in exams2moodle() is now ensured to be "UTF-8" rather
than "utf8" for improved cross-platform compatibility.

Prepared for CRAN as version 2.0-1, excluding exams2blackboard() as this is
not quite ready yet.



git-svn-id: svn://svn.r-forge.r-project.org/svnroot/exams@724 edb9625f-4e0d-4859-8d74-9fd3b1da38cb