LSNBLDR-177; supply missing messages; convert links in HTML pages to relative form


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/trunk@123794 66ffb92e-73f9-0310-93c1-f5514f145a0a
LSNBLDR-177; need to convert links in assignment instructions


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/trunk@123797 66ffb92e-73f9-0310-93c1-f5514f145a0a