Think of fencing and what comes to mind? Errol Flynn as Robin Hood? Or perhaps other dashing characters like Zorro, Cyrano, or Inigo Montoya from “The Princess Bride?” But for tens of thousands of everyday folk, they’re swashbucklers, too.Before she took up fencing 12 years ago, Margaret Kerr couldn’t imagine herself brandishing a foil and competing in a national fencing competition. But in March in Cincinna…