Three nights of free South by Southwest shows came to a close on Auditorium Shores with the songs of Austin's own Patty Griffin floating along Lady Bird Lake on a mild night that seemed a fitting finale for a SXSW that was marked mostly by smooth sailing. Griffin, whose new self-titled album came out last week, headlined a four-hour show that also featured sets from Chicago multi-instrumentalist Andrew Bird, Arizona singer-songwriter Courtney Marie Andrews and Nashville guitarist William Tyler. Thousands of Austinites and out-of-towners relaxed on blankets or stood near the front of the stage to take in the music...