By Denny Dyroff, Entertainment Editor, The Times Howard Jones On February 26, the Sellersville Theater (24 West Temple Avenue, Sellersville, 215-257-5808, www.st94.com) will be the local stop for a tour that features two musicians who are very similar in some ways and very unlike in others. Both acts are singer-songwriters who rock – or, if you prefer, rockers who are talented singer-songwriters....