BILLINGS, Montana (The Daily Montanan) — A Billings woman has filed a suit in district court against a McDonald’s fast-food restaurant that she said sickened her by selling a quarter-pound hamburger that contained the toxin E.coli, according to court documents. The woman is just one of 90 people across mostly the Rocky Mountain West, including 17 in Montana, who have been sickened by the outbreak, which has been linked to yellow onions used in the hamburgers. The McDonald’s location sits several hundred feet away from Interstate 90 on Southgate Road and is operated by the franchisee Pasha Ente…