CONTRIB-4878: url escape mailto links
Merge pull request #12 from carleton/CONTRIB-4878

CONTRIB-4878: url escape mailto links
fixing regression caused by CONTRIB-4865
format lang tags in file name
Merge branch 'master' of git://github.com/bostelm/moodle-mod_scheduler
Merge branch 'master' into 01_allowmulticourseappointment