SAM-1837 - Building samigo-audio module from source creates an unsigned jar


git-svn-id: https://source.sakaiproject.org/svn/sam/branches/samigo-2.9.x@307596 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAM-1997 - Configure samigo to used released audio jar for custom builds


git-svn-id: https://source.sakaiproject.org/svn/sam/branches/samigo-2.9.x@307597 66ffb92e-73f9-0310-93c1-f5514f145a0a