BY CLARE BALDWIN AND JOHN RUWITCH (Reuters) – Hong Kong leader Leung Chun-ying defied pro-democracy protesters’ demands to step down by Friday, and repeated police warnings that the consequences would be serious if they sought to surround or occupy government buildings. Leung, speaking to reporters just minutes before an ultimatum for him to resign expired, also said that Chief Secretary Carrie Lam would hold a meeting with students soon to discuss political reforms. He gave no time frame. […]