(Adds quotes) By Liana B. Baker RIO DE JANEIRO, Aug 20 (Reuters) - South Korea's Inbee Park won the first Olympic gold medal in women's golf since 1900 with a commanding five-stroke victory on Saturday, with no rival coming close to claiming the prize she had prepared for all year. Twenty-eight-year-old Park, who is the Ladies Professional Golf Association's youngest hall of fame qualifier, capped off an exceptional Olympic performance after recovering from injuries that kept her off the course for two months this year. Park was all smiles after receiving the gold medal which she can add to her collection of seven major wins. More...