JESSIE PANG and JOYCE ZHOU HONG Kong pro-democracy activist Joshua Wong has been remanded in custody after pleading guilty to charges of organising and inciting an unauthorised assembly near the police headquarters during last year's anti-government protests. Wong, who was just 17 years old when he became the face of the 2014 student-led Umbrella Movement democracy protests, faces a maximum three-year jail term. The sentence will be delivered by December 2 at 2.30 p.m. (1830 GMT) Before being taken away by security staff, Wong shouted "Everyone hang in there! Add oil" in the courtroom, using a popular Cantonese expression of…