By Denny Dyroff, Staff Writer, The Times Fans of the Dave Matthews Band know that it might be a while until their favorites return to the area for a show – or a run of shows. Fortunately for them, they can tap into the music of the DMB by visiting Kennett Flash (102 Sycamore Alley, Kennett Square, 484-732-8295, http://www.kennettflash.org)  on February 10 when the venue presents “Crowded Streets...