Before Lilly Pruett had a chance to show what she can do at her first United States Association of Independent Gymnastics Clubs national competition in Florida, she saw her friend and training partners' dreams of gold crash in front of her.Katherine Magill, 16, competing out of Gold Country Gymnastics along with Pruett, fell during her bar routine, dislocating her elbow and removing her from competition, said Magill's mother Pamela Magill.The injury is especially painful because Katherine Magill had battled through strep throat at the 2011 national competition and still managed a fourth-place finish overall. This year she was looking forward …