By Denny Dyroff, Staff Writer, The Times John5 Fans who love progressive music with an emphasis on tasty string work – guitar, electric violin, mandolin — should not even think of being anywhere but the Sellersville Theater (24 West Temple Avenue, Sellersville, 215-257-5808, www.st94.com) on the evening of February 10. The dynamite double-bill will be headlined by John 5 and the Creatures...