ANTANANARIVO, Madagascar (AP) — About 1,000 protesters marched in Madagascar’s capital on Thursday and clashed with police who used tear gas and stun grenades to disperse them in parts of the city. The violence marked the third week of what has been the most significant unrest in years in the Indian Ocean island nation . Police could be seen patrolling the streets of of Antananarivo in armored cars and charging at protesters, most of them wearing masks. It wasn’t immediately clear if there were