LSNBLDR-216; add more MIME types for HTML5 audio


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/trunk@126378 66ffb92e-73f9-0310-93c1-f5514f145a0a
LSNBLDR-246; debugging code left in


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/trunk@126380 66ffb92e-73f9-0310-93c1-f5514f145a0a