By Martyn Herman LONDON, March 5 (Reuters) - Poland's Katarzyna Pawlowska was crowned world champion for the third time when she stormed to gold in the points race at the London velodrome on Saturday. Pawlowska steadily accumulated points on the intermediate sprints that are the feature of the 100-lap race, edging Canada's Jasmin Glaesser into the silver medal position. Cuba's Arlenis Sierra Canadilla was third. More...