LSNBLDR-191; clarify video URLs, document new question type


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/trunk@118832 66ffb92e-73f9-0310-93c1-f5514f145a0a
LSNBLDR-191; chage should have been checked into 190


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/trunk@118834 66ffb92e-73f9-0310-93c1-f5514f145a0a
LSNBLDR-190; add documentation to general.html


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/trunk@118835 66ffb92e-73f9-0310-93c1-f5514f145a0a