In the 2010s, the genre of indie folk had its mainstream boom through the success of bands such as Mumford and Sons and the Lumineers. Stripped-down musical accompaniment that was still catchy and upbeat was now in vogue, even though it had been bubbling up since at least the '90s. One performer who was ahead of the trend was Matthew Stephen Ward, known professionally as M. Ward, and he can be seen at Felton Music Hall Friday.