First, he hoisted a big glass of beer in a celebratory toast. Then he wielded an oversized pair of scissors to cut the ceremonial ribbon. “Let’s get this place open!” a smiling Tim Fox shouted Saturday morning while inviting the crowd inside to Yesterday’s Creekside Tavern on Roosevelt Boulevard in Marmora. Actually, Yesterday’s was already open for business. But Fox has given the bar and restaurant such a dramatic makeover since he bought it in February that it is, in effect, a brand-new place just waiting for customers to discover it this summer.