Colter Wall (photo: William Wayland) Cattle still graze and the town still has a livestock auction yard. Petaluma still has a feed mill and the grain elevator is the tallest structure in town. When Colter Wall played the historic Mystic Theatre on Saturday, there were so many men in cowboy hats you could have mistaken it for Mr. Wall’s hometown of Swift Current, Saskatchewan instead of a North Bay suburb of San Francisco. Which is good, because Colter Wall sings cowboy songs. Not kitschy, Gene-Autry cowboy songs. Honest-to-goodness Western songs that could have been strummed on a distant range a hundred and [...]