Red Staple to Debut Authoring Tool for Easy and Affordable Creation of LPs/Extras at the 25th Annual South By Southwest (SXSW) Music Conference SAN LUIS OBISPO, CA--(Marketwire - March 14, 2011) - Red Staple, Inc., a pioneer of tools that enable independent artists to easily and affordably create digital packages (like iTunes LPs and Extras)...