Alain Robert, better known as the French Spider-Man, entered the fray of the Hong Kong anti-government protests on Friday by climbing the Li Ka-shing owned Cheung Kong Center and hanging a banner with the Hong Kong and China flags above a handshake.The French climber, 56, has gained notoriety from scaling skyscrapers around the world, often without safety equipment.Almost exactly a year ago, he was given a ban from climbing in Hong Kong. At the time, he joked he would be back on day 366.In 2011…